Addenda to the spores of the pteridophytes : illustrations of the spores of the fern and fern allies : a guide to the type species of the extant genera of the Pteridophytes, and to selected extinct spore genera - Kremp, Gerhard Otto Wilhelm 1913-1994; Kawasaki, Tsugio (Tokyo : Hirokawa Publishing Company, 1972)
Keywords: ESPORAS FOSILES; PTERIDOFITOS; ESPORAS (BOTANICA)