Arruda, S.T. Analise economica da producao da borracha natural no Estado de Sao Paulo Economic analysis of natural rubber production in Sao Paulo State - Piracicaba, SP (Brasil): 1986. - 114 p. Summaries (Eng, Por); 26 ref. Subjects--Topical Terms: HEVEICULTURABORRACHACUSTO DE PRODUCAOSAO PAULO