Ansuri, M.T., Chaudry, M.I.A., Hafeez, S., Khokhar, M.Y. and Raul, A. 1999. ?EFFECT OF pH ON NI ADSQRPTION IN ORGi\.NO .•MINERAL COMPLEXES. Biological Sciences - PJSIR. 42, 2 (Apr. 1999), 59–62.