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Environmental aspects of natural resource management : agriculture and soils / by Raymond J. Penn.
- FAO,
- 1972.
- Rome :
-
Report to the government of India (State government of Uttar Pradesh) on the uses of welding processes in the repair and fabrication of agricultural machinery / by Raymond K. Ryan.
- 856.1
- FAO,
- 1954.
- Rome :
-
Report to the government of Ceylon on the production of vaccine for the control of haemorrhagic septicaemia / by Raymond F. Jones.
- 856.4
- FAO,
- 1967.
- Rome :