Ridgeon, B. The Economics of pig production. Ipswich: Farming Press, 1993 IX, 275 p. : tab., ill. 0-85236-269-2.
Ridgeon, B. The Economics of pig production. Ipswich: Farming Press, 1993 IX, 275 p. : tab., ill. 0-85236-269-2.
Ridgeon, B. (1993) The Economics of pig production, Ipswich: Farming Press IX, 275 p. : tab., ill. 0-85236-269-2.
Ridgeon, B. (1993). The Economics of pig production. Records and perfomans of pig production as monitored by The Cambridge Pig Management Scheme. Ipswich: Farming Press, IX, 275 p. : tab., ill.
Ridgeon B. The Economics of pig production: Records and perfomans of pig production as monitored by The Cambridge Pig Management Scheme. Ipswich: Farming Press; 1993. p. IX, 275 p. : tab., ill. ISBN: 0-85236-269-2.
