Sandhu, G. (1990). Research techniques in biological sciences. Anmol.
Tohutoru Kātū Chicago (17th ed.)Sandhu, G.S. Research Techniques in Biological Sciences. New Delhi: Anmol, 1990.
Tohutoro MLA (9th ed.)Sandhu, G.S. Research Techniques in Biological Sciences. Anmol, 1990.
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