by L.P. Wilding | .
by Dusan Zachar | .
by C. Broertjes | A.M. Harten.
by Steven D. Tanksley | Thomas J. Orton.
by John F. Stone | Wayne O. Willis.
by M.J. Frissel | .
by L.J. Carpentier | .
by A. Dam Kofoed | .
by Jorgensen, S E | .
by Chen, C H Ed | .
by Verstappen, H Th | .
by Holmes, J W | .
by Duijvenbooden, W Van Ed | .
by Evertt, Lorne G | .
by Kinzerlbach, Wolfgang | .
by Gilbert, Lawrence I | .
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