The Natural History of the Double-crested Cormorant

Lewis, Harrison F.

Auks: An Ornithologist's Guide

Freethy, Ron

Life Histories of North American Diving Birds

Bent, Arthur Cleveland

Penguins

Davis, Lloyd Spencer and Martin Renner

A Population Study of Penguins

Richdale, L.E.

Loon Magic

Klein, Tom

Diving Birds of North America

Johnsgard, Paul A.

Project Puffin

Kress, Stephen W.; Derrick Z. Jackson

The Skuas

Furness, Robert W.

Osteology and Myology of the Head and Neck of the Pied-Billed Grebes (Podilymbus).

Zusi, Richard L. and Robert W. Storer

Red-throated Loon: Birds of North America species account

Jack F. Barr, Christine Eberl, & Judith W. McIntyre.

Pacific Loon/Arctic Loon: Birds of North America species account

R.W. Russell.