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Relationship between light and oat stem rust infection types.
(Iowa State University, 1967)
On the prevalence importance and control of helminths in cattle in Colombia.
(UNIVERSITY OF WISCONSIN, 1968)
Crossability of the South American wild potato species Solanum acaule Bitt. to the cultivated potato Solanum tuberosum L.
(Universidad de Wisconsin, 1965)
Administrative principles and procedures of the Agricultura Experiment Stations
(Oregon State University, 1967)
Valoración preliminar de la acción insecticida, acaricida y nematicida del compuesto experimental UC-21149, bajo condiciones de invernadero.
(Instituto Tecnologico y de Estudios superiores de Monterrey, 1967)