1. You can't just rely on secondary sources for your research into her life history - you ought to look at primary sources such as her letters and diaries.

2. Historians use a wide range of primary and secondary sources for their research.

3. The distinction between primary and secondary sources will not always be immediately obvious to the pupil.

4. Secondary sources, in contrast(http:///secondary source.html), are interpretations of the past produced at a later date.

5. Secondary sources for A level essays will probably be the work of historians.

6. Clearly distinguish between primary and secondary sources, and between the different types of history books.

7. Agriculture, deforestation and the other secondary sources of greenhouse gases are critical to many.

8. Don't rely exclusively on a single secondary source for information or opinion in a research paper.

9. Meat is, at best, a secondary source of essential elements.

10. Analysts say a possible secondary source for the display panels is Taiwan-based manufacturer Innolux Display Corp., an affiliate of Hon Hai.

11. A data field that provides a secondary source of distinctions by which to sort records.

12. The happiness that is derived from some secondary source is never very deep.

13. A secondary source might be a written report based on the original document.

14. And the acoustical feedback of the secondary source is one of the key problems that affect noise reduction in ducts.

15. In his failure to take these differences into account, Leibniz fell victim to his reliance on secondary sources.

16. When looking at reliability one principal concern was the purpose of the writer - whether of a primary or secondary source.

17. In addition, official publications dealing with policy and some secondary source materials will be drawn upon.

18. The emphasis is on interpretation and evaluation of a variety of primary and secondary source material.

19. Questions on data availability are likely to be particularly important where users are heavily dependent on secondary sources.

20. The effective teacher of history will need to use both primary and secondary sources.

21. Scholars and researchers use the library approach when attempting to write articles for publication based on secondary sources.

22. When using video film or broadcasts for history, pupils should be encouraged to make the distinction between primary and secondary sources.

23. Active enquiry is a feature of the course which places a heavy emphasis on the use of primary and secondary sources.

24. The granites not only caused the remobilization of gold but also serve as the secondary source bed.

25. Government data suggest that about 131, 000 households use coal as their primary source of heat, with perhaps 80, 000 more using it as a secondary source.

26. But the press release issued by the fire department the next day would be a secondary source.

27. It is pointed out that in the consideration of single secondary source, the reverse wave motion Huygens' principle can be thought right, while taking it as sole migrating principle is wrong.

28. A physical model of the active control of torsional wave is set up in this paper. Dinfluence of error sensor and secondary source on the optimal control results is studied.

29. Many scholars have commented on the difficulty in producing secondary source narratives from the "raw data" which makes up the past.

30. A light source model regarding the fiber as a secondary source was established based on optical field distribution analysis.

31. Simulations about reducing noise excited by engine revolution are done by laying secondary source at proper places on the simplified finite element model of a passenger car.

32. In this thesis, the study is focused on the characteristics of distributed sound source and its using in the active acoustical structure as the secondary source, including the foll.

33. On the other hand, most undergraduate research projects are limited to secondary source material.

34. And it concluded that "approximately 1.3 million sellers around the world use eBay as their primary or secondary source of income," with an esti-mated 630,239 in the United States.

35. Additional food samples are currently being analysed to identify any potential secondary source of exposure.

36. The xsl:apply-templates instruction means that the processor walks through the secondary source and applies templates as it goes along.