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Schwartz, D A, Donham, K J, Olenchock, S A, Popendorf, W J, Van Fossen, D S, Burmeister, L F, and Merchant, J A

Schwartz, D A, Davis, C S, Merchant, J A, Bunn, W B, Galvin, J R, Van Fossen, D S, Dayton, C S, and Hunninghake, G W

Schwartz, D A, Helmers, R A, Galvin, J R, Van Fossen, D S, Frees, K L, Dayton, C S, Burmeister, L F, and Hunninghake, G W

Schwartz, D A, Van Fossen, D S, Davis, C S, Helmers, R A, Dayton, C S, Burmeister, L F, and Hunninghake, G W