CampbellJ.G.:
Tumors of the Fowl,
pp. 7–10.
J. B. Lippincott Co.,
Philadelphia,
1969
2.
EffronM.GrinerL.BenirschkeK.:
Nature and rate of neoplasia found in captive wild mammals, birds and reptiles at necropsy.JNCI59:
185–194,
1977
3.
HeadK.W.:
Tumors of the upper alimentary tract. In: International Histological Classification of Tumors of Domestic Animals.Bull WHO53:
145–186,
1976
4.
JenningsA.R.:
Tumours of free-living and wild mammals and birds in Great Britain.Symp Zool Soc Lond24:
273–287,
1968
5.
KempR.L.:
Trichomonads, other flagellates, and protozoa.In:
Diseases of Poultry,
7th ed,
pp. 841–846.
Iowa State University Press,
Ames, Iowa,
1978
6.
KeymerI.F.:
A survey and review of the causes of mortality in British birds and the significance of wild birds as disseminators of disease.Vet Rec70:
713–720,
1958
7.
KoestnerA.BuergerL.:
Primary neoplasms of the salivary glands of animals compared to similar tumors in man.Pathol Vet2:
201–226,
1965
8.
MacDonaldJ.W.:
Mortality in wild birds.Bird Study12:
181–195,
1965
9.
SiegfriedL.M.:
Neoplasms identified in free-flying birds.Avian Dis27:
86–100,
1982