Evolutionary trends in Foraminifera : a collection of papers dedicated to I. M. van der Vlerk on the occasion of his 70th birthday - Koenigswald, G. H. R. Von (Gustav Heinrich Ralph), 1902-1982 (Amsterdam : Elsevier Pub., 1963)
Keywords: Vlerk, I. M. van der -- 1892-; Foraminifera, Fossil