For citations:
Yakubov E.N. Interactive Project “Ecological Calendar”. Bibliotekovedenie [Russian Journal of Library Science]. 2013;(2):121-122. (In Russ.) https://doi.org/10.25281/0869-608X-2013-0-2-121-122
Yakubov E.N. Interactive Project “Ecological Calendar”. Bibliotekovedenie [Russian Journal of Library Science]. 2013;(2):121-122. (In Russ.) https://doi.org/10.25281/0869-608X-2013-0-2-121-122