kw.\*:("PROGYMNOSPERMAE")
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PROTEOKALON A NEW GENUS OF PROGYMNOSPERMS FROM THE DEVONIAN OF NEW YORK STATE AND ITS BEARING ON PHYLOGENETIC TRENDS IN THE GROUP.SCHLECKLER SE; BANKS HP.1971; AMER. J. BOT.; USA; 1971, VOL. 58, NUM. 0009, P. 874 A 884Miscellaneous
Morphologie végétative des Progymnospermes et Ptéridospermales du Paléozoïque = Vegetative morphology of Progymnosperms and Pteridosperms from PaleozoicGALTIER, J.Colloque international sur l'arbre. 1986, pp 495-505Conference Paper
Origin of seed plants: an aneurophyte/seed-fern link elaborated = Origine des plantes à graines: un lien entre plante aneurophyte et fougère à graineROTHWELL, G. W; ERWIN, D. M.American journal of botany. 1987, Vol 74, Num 6, pp 970-973, issn 0002-9122Article