From the middle of the 1920s onwards, Otto Wettstein (1892-1967) published "Beiträge zur Säugetierkunde Europas" mostly based upon the material on small mammals collected in Austria. In 1933 "Die freilebenden Säugetiere Österreichs" appeared, a compiled volume by H. Rebel which remained the only available summary of the mammal fauna of Austria for a long time. At around the same period, collecting trips were carried out to south east Europe and Turkey by staff members of the mammal collection (O. Koller and O. Wettstein).
As a result of this intensive collecting activity, 23 monographs of Austrian mammals ("Mammalia austriaca") were published as contributions to the Mammal Fauna of Austria (F. Spitzenberger: Säugetierfauna Österreichs, Graz, 895 pp.) This comprehensive work appeared in 2002. It contains maps of the current and Holocene geographic and altitudinal distribution of the 102 mammal species recorded for Austria and detailed species accounts including information on the faunal history, former and present distribution and numbers, ecology, threats and suggested protections measures.
Continuing an earlier house tradition, F. Spitzenberger conducted numerous excursions to Turkey, as well as Cyprus, Morocco, Libya and East Africa. The publications on the specimens collected in Turkey form a basic inventory of information on the mammals of Asia Minor.