1. Changes in status among British breeding birds;Alexander;Br. Birds,1944
2. The breeding seasons of southern hemisphere birds in the northern hemisphere;Baker;Proc. zool Soc. Lond. (A),1938
3. Winter feeding patterns in the House Sparrow;Beer;Auk,1961
4. Untersuchungen zur Brutbiologie des Feldsperlings (Passer m. montanus L);Creutz;Zool. Jb. Abt. Syst. Ök. Geog. Tiere,1949
5. Seasonal changes in the energy balance of the English Sparrow;Davis;Auk,1955