The scrophulariaceae of eastern temperate North America
Print Book, English, 1935
[éditeur non identifié], Philadelphia, 1935
The Academy of Natural Sciences of Philadelphia, monographs ; no.1, no.1
xiv, 650 pages : illustrations, cartes ; 27 cm
1131170454
"Printed by the George W. Carpenter Fund for the Encouragement of Original Scientific Research."