At: Iskop. Tsvetk. Rast. Ross., St.-Petersburg, 3 By: Iljinskaja I. A.
journalAt: Science, 156, 3774 By: Schopf J. W., Barghoorn E. S.
journalAt: Alcheringa, 26, 3 By: Mamet B. L., Pohler S. M. L.
journalAt: Botanical Journal of the Linnean Society, 86, 1 By: Edwards D. S., Lyon A. G.
bookAt: Atlas Rukov. Form Fauny Fl. Zap. Sibiri, Moscow, Gosudarstvennoe nauchno-tekhnicheskoe izdatel'stvo literatury po geologii i okhrane nedr, 1955, 1 By: Krasnopeyeva P. S.
journalAt: Bollettino della Società Geologica Italiana, 85, 1 By: Praturlon A.
journalAt: Proceedings of the Royal Physical Society of Edinburgh, 23, 2 By: Anderson F. W.
journalAt: Current Science, 26, 6 By: Rao A. R.
journalAt: Studii şi cercetări de geologie, geofizică, geografie, Series, Geologie, 12, 2 By: Dragastan O. N.
journalAt: Neues Jahrbuch für Geologie und Paläontologie Monatshefte, 1961, 7 By: Flügel E.