Vermeer, K. 1963. The breeding ecology of the glaucous-winged gull (Larus glaucescens) on Mandarte Island, B.C. Occas. Pap. B. C. Prov. Mus. 13:1-104.
Wynne-Edwards, V. C. 1959. The control of population-density through social behaviour: a hypothesis. Ibis 101:436-441.
[Time-Energy Use and Life History Strategies of Northern Seabirds]
by
Erica H. Dunn
Long Point Bird Observatory
Point Rowan, Ontario, Canada