{"source":"book","style":"apa","contributors": [{"function":"author","last":"Burk","first":"Bruce"} ],"pubtype": {"main": "pubnonperiodical"},"pubnonperiodical": {"title":"Waterfowl studies","publisher":"Winchester Press","city":"New York","year":"1976"},"datasource":"/z-wcorg/","datasource":"http://www.worldcat.org","oclc":"2238339","isbn":"0876911807 9780876911808"}