https://opac.sciencelib.ge/cgi-bin/koha/opac-search.pl?q=ccl=Provider%3A%D0%98%D0%B7%D0%B4.%20%D0%BD%D0%B0%20%D0%91%D1%8A%D0%BB%D0%B3%D0%B0%D1%80%D1%81%D0%BA%D0%B0%D1%82%D0%B0%20%D0%90%D0%BA%D0%B0%D0%B4%D0%B5%D0%BC%D0%B8%D1%8F%20%D0%BD%D0%B0%20%D0%9D%D0%B0%D1%83%D0%BA%D0%B8%D1%82%D0%B5%2C%20&sort_by=pubdate_dsc&format=rss 4 0 50 ISBN: https://opac.sciencelib.ge/cgi-bin/koha/opac-detail.pl?biblionumber=545714 By Георгиев, Димитър А..
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190 с. :

]]> Place hold on Общ енергиен баланс на България за годините :

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, На болгарском языке.

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, На арабском языке.

]]> Place hold on Неприятели на зеленчуковите растенияв България и борбата с тях /

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630 с.

]]> Place hold on Естествознанието в средновековна България

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