000 00409nam a2200121Ia 4500
008 160316s9999 xxu||||| |||| 00| 0 eng d
100 _aEbert, James D
245 _aInteracting systems in development
260 _aNew York
_bHolt
_c1970
300 _aIX, 338p
650 _aBiology-development
999 _c7840
_d7840