Early Tertiary species of Azolla subg. Azolla sect. Kremastospora from western and arctic Canada
Sweet, A. R., Hills, L. V.Volume:
54
Language:
english
Journal:
Canadian Journal of Botany
DOI:
10.1139/b76-031
Date:
February, 1976
File:
PDF, 2.44 MB
english, 1976