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Microfilm and Microfiche Reduction
There are 2 major types of microfiche, Source and COM.
Source Microfiche Note orientation of images compared to COM microfiche. 24X reduction source microfiche = 14 images across x 7 images down 36X reduction source microfiche = 24 images across x 12 images down 42X reduction source microfiche = 25 images across x 13 images down 48X reduction source microfiche = 28 images across x 16 images down
COM Microfiche Note orientation of images compared to source microfiche. 24X reduction source microfiche = 9 images across x 8 images down with 62 data frames 27X reduction source microfiche = 9 images across x 10 images down with 79 data frames 42X reduction source microfiche = 14 images across x 16 images down with 207 data frames 48X reduction source microfiche = 16 images across x 18 images down with 269 data frames
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