German art in the 20th century,
by Franz Roh, with additions by Juliane Roh.
APA Citation
Roh, F., Roh, J. (1969). German art in the 20th century. [English language ed. Greenwich, Conn.: New York Graphic Society.
MLA Citation
Roh, Franz, 1890-1965, and Juliane Roh. German Art In the 20th Century. [English language ed. Greenwich, Conn.: New York Graphic Society, 1969.
Warning: These citations may not always be complete (especially for serials).