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http://www.med.cz

http://www.beekeeping.cz

http://www.psg.sk/prezenta/gnectar

http://www.beekeeping.com

http://www.beesource.com

http://www.bfl.at/institut/bienen/

http://www.apiservices.com

http://afnet.uniag.sk/~chlebo

http://greenfield.fortunecity.com/buzzard/397/index.html