Amendments to the international rules for seed testing 1985 : as agreed on by the 22nd ISTA Congress in Edinburgh, July 1989 valid July 1st, 1987 : see also the amendments from the ISTA Congress 1986, valid since July 1st, 1987.
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| Format: | Book |
| Language: | English |
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Zurich :
The International Seed Testing Association,
1990.
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