Cultivar purity testing handbook / Prepared by the Cultivar Purity Testing Committe of the Association of Official Seed Analysts - 78 p. : il. ; 27 cm. Contribution No. 33 to the Handbook on Seed Testing Subjects--Topical Terms: BIOTECNOLOGIA VEGETALSEMILLAS--ANALISIS Dewey Class. No.: 631.52 / C85 1991