Nesting seasons of Western Australian birds / by I.C. Carnaby. Two new species of burrowing frogs of the genus Helioporus Gray from south-western Australia / by A.K. Lee and A.R. Main. The relationships of the quokka (Setonix brachyurus) / by G.B. Sharman.
Factors influencing selection of shelter by individual quokkas, Setonix brachyurus (Marsupialia), during hot summer days on Rottnest island