002940000a22001210004500060000800000082002000008100002100028245002800049260005200077260000900129300000800138650002600146  a100  a630.241 388 SRE  aSree Ramulu, U S  aIsotopes in agriculture  aNew Delhi, Oxford & IBH publishing co. pvt. ltd  c1982  a320  aIsotopes- agriculture