Keywords: Pjotr Alexandrowitsch Tschichatschow.jpeg en wikipedia Magnus Manske CommonsHelper PD-old Original upload log page en wikipedia Chikhachov jpeg 2007-08-02 08 05 Oldest joe 150×200× 6307 bytes <nowiki>http //slovari yandex ru/art xml art bse/00089/77900 htm encpage bse mrkp http 3A//hghltd yandex com/yandbtm 3Furl 3Dhttp 253A//encycl yandex ru/texts/bse/00089/77900 htm 26text 3D 25EF 25E5 25F2 25F0 2B 25F7 25E8 25F5 25E0 25F7 25E5 25E2 26reqtext 3D 252</nowiki> 1812 births 1890 deaths Biologists from Russia Geologists from Russia Men of Russia Chikhachov family |