000 003330000a22001450004500
060 _a100
082 _a595.7019153 BEC;01
100 _aBeck, Stanley d
245 _aInsect photoperiodism
260 _aNewyork, Academic press
260 _c1968
300 _a288
650 _aEntomology/insects- photoperiodism
942 _cBK
999 _c350416
_d350416