Monotremes and marsupials ;
a reference for zoological institutions.
APA Citation
United States. Smithsonian Institution. (1973). Monotremes and marsupials: a reference for zoological institutions. .
MLA Citation
United States. Smithsonian Institution. Monotremes And Marsupials: a Reference for Zoological Institutions. , 1973.
Warning: These citations may not always be complete (especially for serials).