Endangered species /
[by] Wolfgang Ullrich, Erich and Isabella Tylinek.
APA Citation
Ul̇lrich, W. (19721971). Endangered species. New York: Hart Pub. Co..
MLA Citation
Ul̇lrich, Wolfgang, zoologist. Endangered Species. New York: Hart Pub. Co., 19721971.
Warning: These citations may not always be complete (especially for serials).