000 00286 a2200121 4500
080 _a595.7
_bW 722 I
245 1 _aInsec migration
_cby C.B. Williams
260 _aLondon
_c1958
650 _aInsect Migration
100 1 _aWilliams, C.B.
_d
300 _a235 p. & 11 pls.
901 _a60686
999 _c37755
_d37755