"V. L. Chopra on CGIAR"(PDF). Consultative Group on International Agricultural Research. 2016. Retrieved 3 May 2016.
cukerala.ac.in
"Chancellor". Central University of Kerala. 2016. Archived from the original on 12 September 2018. Retrieved 6 May 2016.
handle.net
hdl.handle.net
Chopra, V. L. (1967). "Tests for genetic effects of irradiated or chemically treated media in drosophila and micro-organisms". hdl:1842/13380. {{cite journal}}: Cite journal requires |journal= (help)