Handbook of Avian Hybrids of the World
by Eugene M. McCarthy
2006, 608pp, ISBN: 9780195183238
Bird Hybrids : A Check-List with Bibliography
by Annie P. Gray
1958, 390pp, ASIN: B000K6X53S
British Birds : Mules & Hybrids
by Bernard Williams
2006, 160pp, ISBN: 9780955403705
Spanish Language Only:
Los Híbridos :
Técnica, Cría, Genética, Biología
by Massimo Natale & Leone Giuliano Pidalà
2006, 250pp, ISBN: 9788493301125
1st Edition (1959)
Mule and Hybrid Birds
by V. A. V. Carr & T. L. Banks
1959, 96pp, ASIN: B000WSM0GW
Different Title:
Revised Edition (1980)
Cage Bird Hybrids
by V. A. V. Carr & M. Stringer
1980, 199pp, ISBN: 9780904558814
Cage Bird Hybrids Cage Bird Hybrids
by Charles Houlton, H. Norman, G. E. Weston & C.A. House by Charles Houlton (Revised by James Blake)
1900, 1910, 1911, 1920s, 1929, 1930, 128pp / 144pp 1986, 168pp, ISBN: 9781852590000
Early 1900s
1920s
(1930)
(1986)
Mules & Hybrids :
Production - Management - Exhibition
by Rosslyn Mannering
1947, 110pp
Mules & Hybrids :
A Treatise on the Breeding, Keeping and Exhibiting of Canary Mules and British Hybrids
by C.A. House
1932, 60pp, ASIN: B0008CIYYO
(1996)
Hybrid Ducks : A Contribution Towards an Inventory
by Eric & Barry Gillham
1996, 104pp, ISBN: 9780951155653 / 9781951155605
(2002)
Hybrid Ducks : The 5th Contribution Towards an Inventory
by Eric & Barry Gillham
2002, 88pp, ISBN: 9780951155660