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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
Experimento de manejo de fertilizantes
(CIMMYT, 1979)
Video
No tilliage farming
(CIMMYT, [198-?])
Video
Techniques of plant diagnosis
(CIMMYT, 1980)
Video
Plant nutrition and soil fertility
(CIMMYT, 1980)
Video
Techniques of plant diagnosis
(CIMMYT, 1980)
Video
Maize training field lecture
(CIMMYT, 1979)
Video
The Maize Program: part 3
(CIMMYT, 1978)
Video
Verification trial: Cañada Rica
(CIMMYT, 1979)