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1
by Krug, Ronald S., Cass, Alvah R.
Published 1987
Springer New York
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2
by Krug, Ronald S., Cass, Alvah R.
Published 1995
Springer New York
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3
by Krug, Ronald S., Cass, Alvah R.
Published 1992
Springer New York
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4
by Shaffer, L. Blaine, Krug, Ronald S.
Published 1993
Springer New York
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5
by Shaffer, Lawrence B., Krug, Ronald S.
Published 1996
Springer New York
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6
by Krug, Ronald S., Cass, Alvah R.
Published 1989
Springer New York