Vandermeer, John H.
Elementary mathematical ecology
Krieger, 1990
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Pielou, E.C.
Mathematical ecology
John Wiley & Sons, 1977
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Carman, Robert A.
Basic mathematical skills: a guided approach
John Wiley & Sons, 1981
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Long, Calvin T.
Mathematical reasoning for elementary teachers
Pearson - Addison Wesley, 2009
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Bowers, David A.
Elementary mathematical macroeconomics
Prentice-Hall, 1971
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