Hemileia vastatrix : investigaciones presentes y pasadas en la herrumbre del café y su importancia en la América tropical /

by Wellman, Frederick Lovejoy 1897-1994
Published 1957

Algunas enfermedades importantes del cacao /

by Wellman, Frederick Lovejoy 1897-1994

Bibliografía seleccionada de enfermedades /

by Wellman, Frederick Lovejoy 1897-1994

Enfermedades, insectos y malezas del café, y su control mediante el uso de productos químicos

by Wellman, Frederick Lovejoy 1897-1994

Tropical American plant disease (neotropical phytopathology problems) /

by Wellman, Frederick Lovejoy 1897-1994
Published 1972

Dissemination of omphalia leaf spot of coffee

by Wellman, Frederick Lovejoy 1897-1994
Published 1950

Coffee : botany, cultivation, and utilization

by Wellman, Frederick Lovejoy 1897-1994
Published 1961

Dictionary of tropical american crops and their diseases /

by Wellman, Frederick Lovejoy 1897-1994
Published 1977