1. The eastern form of Rana ridibunda (Anura: Ranidae) inhabits the Nile delta;Akef;Zool. Anz.,1989
2. Population genetics;Allendorf,1978
3. A comparative summary of genetic distances in the vertebrates;Avise;Evol. Biol.,1982
4. Biometrical studies on the population of green frogs from the environs of Poznan;Berger;Ann. Zool.,1966