المؤلفون: Robertson,, William B., Patty, Barbara W.

المصدر: Journal of Field Ornithology, 1983 Jul 01. 54(3), 225-236.

URL الوصول: https://www.jstor.org/stable/4512824

المؤلفون: Bancroft, G. Thomas, Ogden, John C., Patty, Barbara W.

المصدر: The Wilson Bulletin, 1988 Mar 01. 100(1), 50-59.

URL الوصول: https://www.jstor.org/stable/4162516

المؤلفون: Ogden, John C., McCrimmon,, Donald A., Bancroft, G. Thomas, Patty, Barbara W.

المصدر: The Condor, 1987 Nov 01. 89(4), 752-759.

URL الوصول: https://www.jstor.org/stable/1368522

المؤلفون: Dusi, Lullian L., Heinz, Frederic A., King, Kirke A., Lefever, Cathy A., Mulhern, Bernard M., Lock, Anthony R., Patty, Barbara W., Ogden, John C., McCrimmon, Donald A., Southern, Linda K., Southern, William E., Wesoloh, D. V., Mineau, P., White, Donald H., Mitchell, Christine A.

المصدر: Colonial Waterbirds, 1982 Jan 01. 5, 177-179.

URL الوصول: https://www.jstor.org/stable/1521051