Ludwig, James P. Band Wear and Band Loss in the Great Lakes Caspian Tern Population and a Generalized Model of Band Loss (англ.) // Colonial Waterbirds : journal. — 1981. — Vol. 4. — P. 174—118. — doi:10.2307/1521133. — JSTOR1521133.
jstor.org
Ludwig, James P. Band Wear and Band Loss in the Great Lakes Caspian Tern Population and a Generalized Model of Band Loss (англ.) // Colonial Waterbirds : journal. — 1981. — Vol. 4. — P. 174—118. — doi:10.2307/1521133. — JSTOR1521133.