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Programmed learning aid for basic facts on ecology and the social sc iences / Douglas L. Schaefer.

By:

Schaefer, Douglas L

Material type: Text

Text

TextSeries: Programmed Learning Aid SeriesPublication details: Homewood, Ill. : Richard D. Irwin, c1973.Description: vi, 57 p. ; 26 cmISBN:

0256014949

Subject(s):

DDC classification:

304.2

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