International rules for seed testing rules 1993 : adopted at the twenty-third International Seed Testing Congress, Argentina 1992, to become effective on 1 july 1993.
Zürich, Switzerlnad : International Seed Testing Association, 1993.
288 págs. ; 24 cm.
Serie: Seed Science & Technology ; v. 21(suppl.)
ISBN: 3906549275
ISSN: 0251-0952