000 00305nam a2200109Ia 4500
100 _aSlack J M W
250 _aEdn 2
245 _aFrom Egg to Embryo : Regional Specification in early Development .-Edn 2
260 _bCambridge University Press, U K
082 _aK9B/N91/B19367
300 _app 328; 23*15
999 _c35243
_d35243