Nason, Wehrman, Knight And Chapman Inc., Minneapolis
Collins, Bert K. And Urban Systems Research And Engineering, Inc.
Callery, Bernadette G. And Mosimann, Elizabeth A. Compilers
Fritz Hochstatter With Supplementary Scientific Notes By Dr. Gunter Hentzchel With English Translation By Lois Glass
Coulter, John M. Revised By Aven Nelson
Young, James A. & Young, Cheryl G.
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