003740000a22001570004500020002100000060000800021082001900029100001700048245003000065260002100095260000900116300000700125490002500132490002200157650003700179  a0  216  89675  4  a100  a333.  9516 BUR  aBurton, John  aConservation of wild life  aGlasgow, Blackie  c1974  a42  a2cMan and his world  aMan and his world  aEcosystem/ecosystem conservation