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International wheat prices
(1961)
Wheat price supports and acreage allotments
(1959)
Wheat price supports and marketing quotas and Durum wheat
A simple computerised financial analysis and cash flow management system for primary producers : (making use of BSES accounting package)
Longworth, John W., (1979)
Sustainability and agricultural education : the 1991 Farrer Memorial Oration
Longworth, John W., (1992)
Biotechnolgy: scientific potential and socio-economic implications for agriculture
Longworth, John W., (1987)