Kingfisher

Szabo, Ildiko

The Bee-eaters

Fry, C. Hilary

Edge of The Jungle

Beebe, William

The Birds of British Somaliland and the Gulf of Aden: Vol III

Archer, Sir Geoffrey and Eva M. Godman

Illustrations by Archibald Thorburn and Henrik Gronvold

Belted Kingfisher: Birds of North America species account

Michael J. Hamas.

Green Kingfisher: Birds of North America species account

W. Moskoff.

The Auks: Alcidae (Oxford Bird Families of the World)

Gaston, Anthony J. and Ian L. Jones

The Bee-eaters

Fry, C. Hilary

Illustrations by Karalus, Karl E.

A Comparative Study of Todies

Kepler, Angela Kay

The Ecology and Conservation of Asian Hornbills: Farmers of the Forest

KINNAIRD, Margaret F.; O'BRIEN Timothy G.

Illustrations by KINGDON, Jonathan

Handbook of the Birds of the World, Volume 6: Mousebirds to Hornbills

Del Hoyo, Josep; Elliott, Andrew; Sargatal, Jordi