Silurian and Ordovician acritarch assemblages from the northern and western parts of the Russian Platform.
Foreign title:
Kompleksy Akritarkh Ordovika i Silura Severnoy i Zapadnoy Chastey Russkoy Platformy.
Reference:
Umnova,N.I. (1974)
Silurian and Ordovician acritarch assemblages from the northern and western parts of the Russian Platform. [ Kompleksy Akritarkh Ordovika i Silura Severnoy i Zapadnoy Chastey Russkoy Platformy. ] Mezhdunarodnaya Palinologicheskaya Konferentsiya,3rd,Novosibirsk. 1971, Nauka Moskva. Palinologiya Proterofita I Paleofita. (Palynology of Proterophyte and Paleophyte)
P. 33- 38