000 00300 a2200121 4500
080 _a598.2
_bF 857 H
245 1 _aHow birds work
_ba guide to bird biology
_cby R. Freethy
260 _aPoole
_bBlandford Press
_c1982
650 _aBirds
100 1 _aFreethy, R.
_d
300 _a232 p.
901 _a156371
999 _c75780
_d75780