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Results of the fourth international spring wheat yield nursery, 1967-1968 / comp. by David R. MacKenzie.
- 874
- International Maize and Wheat Improvement Center,
- 1971.
- Mexico :
-
Results of the fifth international spring wheat yield nursery, 1968-1969 / comp. by David R. MacKenzie.
- 874
- International Maize and Wheat Improvement Center,
- 1971.
- Mexico :