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Farming systems of the world
Duckham, Alec N., (1970)
Grass and fodder crop conservation in transportable form : memorandum
Duckham, Alec Narraway, (1928)
Food production and consumption : the efficiency of human food chains and nutrient cycles/ ed. by A. N. Duckham ...
Duckham, Alec Narraway, (1976)