na INLIS000000000002986 Ind 0010-1118002986 Seed potato systems in Ecuador: a case study CRISSMAN, Charles C. Charles C. Crissman; Jorge E. Equillas Lima, Peru International Potato Center 1989 70 p. : ill. ; 28 cm. 70 p. : ill. ; 28 cm. 635.21-53CRIs Bibl. p. 47-49 635.21-153.1(866) SEED POTATOES ECUADOR 0158/90-mfn4669