Vries, C A De Employment for millions of small farmers in the tropics: Sericulture, bee-keeping and mushroom growing - Amsterdam: Koninklijk Instituut Vood De Tropen, 1977 - 56p. - Bulletin 299 . Subjects--Topical Terms: Animal husbandry Subjects--Index Terms: Cultivation Trees Universal Decimal Class. No.: 638.2:638.121 / L7