Jain, P CSingh, S NRajvanshi, V SJain, R1981-02-162009-05-311981-02-162009-05-311981-02-16Jain PC, Singh SN, Rajvanshi VS, Jain R. Naturally occurring ABO antibodies in Kanpur (U.P.). Journal of the Indian Medical Association. 1981 Feb; 76(4): 53-5http://imsear.searo.who.int/handle/123456789/99050engABO Blood-Group System --immunologyHumansIndiaIsoantibodies --immunologyNaturally occurring ABO antibodies in Kanpur (U.P.).Journal Article