Morris Arboretum monographs
University of Pennsylvania Press , Oxford University Press, 1935
by Raphael Zon ... [et al.]
University of Pennsylvania Press 1941 Morris Arboretum monographs 2
所蔵館3館
by Conway Zirkle
Univ. of Pennsylvania Press 1935 Morris Arboretum monographs 1
所蔵館6館