Michels, Leo
A basic math approach to concepts of chemistry
Brooks/Cole, 1996
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Michels, Leo
A basic math approach concepts of chemistry
Brooks/Cole, 1993
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Bingham, Robert C.
Economics concepts : a Programmed approach
McGraw-Hill, 1987
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Bingham, Robert C.
Economic concepts : a programmed approach
McGraw-Hill, 1969
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Terry, George Robert
Programmed learning aid for supervision
Richard D. Irwin, 1982
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