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Tech Directions. Aug2008, Vol. 68 Issue 1, p16-19. 4p. 4 Diagrams.
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Education Digest. Sep90, Vol. 56 Issue 1, p45-49. 5p.
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Tech Directions. Jan2003, Vol. 62 Issue 6, p11. 1p. 1 Color Photograph, 1 Black and White Photograph, 6 Diagrams.
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Tech Directions. Dec2016, Vol. 76 Issue 4, p41-42. 2p. 2 Illustrations, 1 Diagram, 1 Chart.
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Tech Directions. Jan2003, Vol. 62 Issue 6, p21. 5p. 2 Color Photographs, 2 Black and White Photographs, 1 Diagram.
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Tech Directions. Jan2017, Vol. 76 Issue 5, p30-30. 1p. 3 Illustrations, 2 Diagrams.
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Tech Directions. Oct97, Vol. 57 Issue 3, p21. 2p. 1 Color Photograph, 1 Diagram.
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Tech Directions. Dec97, Vol. 57 Issue 5, p13. 2p. 2 Color Photographs.
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Tech Directions. Nov2005, Vol. 65 Issue 4, p14-15. 2p.
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Tech Directions. Dec96, Vol. 56 Issue 5, p16. 2p.
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