http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Population growth and breeding biology of the whooper swan, Cygnus c. cygnus, in Finland in 1950-1970
HELMINEN, Matti: -- Population growth and breeding biology of the -- whooper swan, Cygnus c. cygnus, in Finland in -- 1950-1970. 1973 -- s. HAAPANEN, Antti.