1
Published 1993
Book
2
Published 2009
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Electronic
3
Published 2002
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Electronic
4
Published 2009
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Electronic
8
by Smil, Vaclav.
Published 2000
Book
9
by Smil, Vaclav.
Published 2000
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Electronic
10
Published 1993
Book
13
by Meer, C. L. J. van der.
Published 1992
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Electronic
14
by Hoffman, Philip T., 1947-
Published 1996
Book
15
by Pretty, Jules N.
Published 2002
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Electronic
16
Published 2011
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Electronic
17
Published 2010
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Electronic
18
by Perdue, Peter C., 1949-
Published 1987
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Electronic
19
20
Published 2012
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Electronic