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- [1] PROFICIENCY TESTING FOR AGRICULTURE, HORTICULTURE AND FORESTRY IN ENGLAND AND WALES AGRICULTURAL ADMINISTRATION, 1983, 12 (01): : 1 - 19
- [3] Proficiency testing JOURNAL OF THE JAPANESE SOCIETY FOR FOOD SCIENCE AND TECHNOLOGY-NIPPON SHOKUHIN KAGAKU KOGAKU KAISHI, 2003, 50 (10): : 498 - 498