- missouribotanicalgarden.org plant-science/plant-…Yayın zamanı: dün
- boolt.nbgnsc.ru download/118/4-118-2016-en.pdfof the Crimean peninsula, as well as under conditions of Botanical garden named after I.I. Sprygin (the city of Penza). ... Name R. canina.
- izvuz_est_eng.pnzgu.ru en6216
- journals.rcsi.science 0006-8136/article/view/…
- onlineexpo.lv en/otdykh-leisure/exponents/ivan-i.…
- en.wikipedia.org File:Ivan Sprygin - 1.jpg
- virtuaalmess.ee en/otdykh-leisure/exponents/ivan-…
- elibrary.ru item.asp?id=32360189...activities in Russia, based on sources of one of its pioneers, an ecologist and botanist, Ivan Ivanovich Sprygin (1873-1942), a native of Penza region.Bulunamadı: named
- en.m.wikipedia.org File:Ivan Sprygin - 1.jpg