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-  https://bdvets.com/blog

- http://wildpro.twycrosszoo.org/S/00dis/Viral/Duck_Plague.htm [Accessed March 2012].

- http://www.nwhc.usgs.gov/disease_information/other_diseases/duck_plague.j sp [Accessed March 2012].

- https://link.springer.com/chapter/10.1007/978-981-16-6100-6_14/figures/1

- https://townlinehatchery.com/product/khaki-campbell-ducks/

- https://www.linkedin.com/pulse/measures-treat-duck-hepatitis-flu-frequently-occurred-vincent-xing

- https://www.msdvetmanual.com/multimedia/table/vaccination-program-for-duck-breeders

- https://www.msdvetmanual.com/poultry/duck-viral-hepatitis

- https://www.thepoultrysite.com

-  World Organisation for Animal Health (OIE). Chapter 2.03.07: DVE. Manual of diagnostic tests and vaccines for terrestrial animals.

- ww.oie.int/fileadmin/Home/eng/Health_standards/tahm/2.03.07_DVE.pdf. [Accessed March 2012].  U.S Geological Survey (USGS) National Wildlife Health Center.

-  www.nwhc.usgs.gov/publications/field_manual/chapter_16.pdf. [Accessed March 2012].