003100000a22001090004500082001900000100002100019245008500040260002900125260000900154300000800163650002900171  a595.705 24 SOU  aSouthwood, T R E  aEcological methods: with particular reference to the study of insect populations  aLondon, Methuen & Co Ltd  c1966  a391  aEcology/sample programme