found: Web. 3.
found: Random House.
found: LC data base, June 26, 1990(marsupials)
found: Mammal species of the world, 1993:p. 4 (Orders Didelphimorphia, Paucituberculata, Microbiotheria, Dasyuromoprhia, Peramelemorphia, Notoyctemorphia, Diprotodontia were included in Marsupuialia in the 1st ed.)
found: Integrated Taxonomic info. sys., Oct. 8, 1999(Superorder Marsupialia, Infraclass Metatheria, Subclass Theria, Class Mammalia. Usage: valid. Common name: marsupials)
found: Walker mamm. world:v. 1, p. 10 (Order Marsupialia. Marsupials. Marsupials are covered as a single order, some zoologists believe the group should be divided into 2 orders, with more marsupial families than formerly recognized. Marsupials include species diverse in morphology and ecology as moles, wolves, antelopes, etc. united primarily on the basis of common means of reproduction)
