Schmidt, Adolf, 1812-1899. Atlas der Diatomaceen-Kunde. - Leipzig, Königstein, Ts., Zentralantiquariat d. Deutschen Demokratischen Republik; Koeltz, 1972. - 4 v. illus. 41 cm. LCCN: 73303780 Subjects--Topical Terms: Diatoms.Diatomácias LC Class. No.: QK569.D54 / S3 1972 Dewey Class. No.: 574.929