000 00328nam a2200145Ia 4500
008 220601s1973 xx 000 0 eng d
020 _qP B
041 _aEnglish
082 _a612.3
_bRYA L3
100 _aRyall, R J
245 4 _aThe Digestive System
260 _bPenguin Edu.
_c1973
650 _aMedicine
942 _2ddc
_cBK
999 _c4489
_d4489