Stoecker, Wilbert F. (Wilbert Frederick), author
Erlagga, 1989
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Stoecker, Wilbert F. (Wilbert Frederick), author
Erlangga, 1996
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Ballaney, P. L., author
Khanna, 1983
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Stoecker, Wilbert F. (Wilbert Frederick), author
McGraw-Hill, 1982
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Althouse, Andrew D. (Andrew Daniel), author
The Goodheart-Willcox, 1956
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