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Video
Foliar diseases of maize plants: part 2
(CIMMYT, [1979])
Video
Foliar diseases of maize plants: part 3
(CIMMYT, [1979])
Video
Maize training field lecture
(CIMMYT, 1979)
Video
No tilliage farming
(CIMMYT, [198-?])
Video
Essays of planting methods
(CIMMYT, [197-?])
Video
Foliar diseases of maize plants: part 1
(CIMMYT, 1979)
Video
Fertilizer use efficiency
(CIMMYT, [1980])
Video
Experimento de manejo de fertilizantes
(CIMMYT, 1979)
Video
Techniques of plant diagnosis
(CIMMYT, 1980)
Video
Plant nutrition and soil fertility
(CIMMYT, 1980)