na INLIS000000000002987 Ind 0010-1118002987 Seed potato systems in the Philippines: a case study CRISSMAN, Charles C. Charles C. Crissman Lima,Peru CIP 1989 68 p. : ill. ; 28 cm. 68 p. : ill. ; 28 cm. 635.21-153CRIs Bibl. p. 57-59 635.21-153.1(91) SEED POTATOES PHILIPPINES 0160/90-mfn4670