1. Landscape-geographical zones of the USSR;Berg;German: Die geographischen Zonen der Sowjetunion,1931
2. Fazies, geographical aspects, and geographical zones;Berg;Izv. russk. geogr. obshch.,1945
3. Plant succession;Clements;Carnegie Inst. of Washington, Publ. 242,1916
4. The physiographic ecology of Chicago and vicinity;Cowles;Bot. Gaz.,1901
5. Grundsätze und Grundbegriffe der biozönologischen Forschung;Dahl;Zool. Anz.,1908