ebrary, Inc, & Weller, M. W. (1988). Waterfowl in winter: Selected papers from symposium and workshop held in Galveston, Texas, 7-10 January 1985. University of Minnesota Press.
Lua i Stíl Chicago (17ú heag.)ebrary, Inc, agus Milton Webster Weller. Waterfowl in Winter: Selected Papers from Symposium and Workshop Held in Galveston, Texas, 7-10 January 1985. Minneapolis: University of Minnesota Press, 1988.
Lua MLA (9ú heag.)ebrary, Inc, agus Milton Webster Weller. Waterfowl in Winter: Selected Papers from Symposium and Workshop Held in Galveston, Texas, 7-10 January 1985. University of Minnesota Press, 1988.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.