(1998). Beekeeping industry and technical bulletins. Library of Congress Office ; Library of Congress Photoduplication Service.
Lua i Stíl Chicago (17ú heag.)Beekeeping Industry and Technical Bulletins. New Delhi : Washington, D.C.: Library of Congress Office ; Library of Congress Photoduplication Service, 1998.
Lua MLA (8ú heag.)Beekeeping Industry and Technical Bulletins. Library of Congress Office ; Library of Congress Photoduplication Service, 1998.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.