Bee Research Association. (1971). English alphabetical subject index to Universal Decimal Classification numbers used by the Bee Research Association in Apicultural Abstracts and in subject indexes: [EASI 2] (2nd enl. ed.). Bee Research Association.
Chicago-Zitierstil (17. Ausg.)Bee Research Association. English Alphabetical Subject Index to Universal Decimal Classification Numbers Used by the Bee Research Association in Apicultural Abstracts and in Subject Indexes: [EASI 2]. 2nd enl. ed. Chalfont St. Peter: Bee Research Association, 1971.
MLA-Zitierstil (9. Ausg.)Bee Research Association. English Alphabetical Subject Index to Universal Decimal Classification Numbers Used by the Bee Research Association in Apicultural Abstracts and in Subject Indexes: [EASI 2]. 2nd enl. ed. Bee Research Association, 1971.