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020 _a713143290
082 _a614.593
_bLAN
_223
100 _aLANGMAN, M.J.S.
245 4 _aThe Epidemiology of choronic digestive disease
_c/[by] M.J.S. Langman
260 _aLondon
_bEdward Arnold
_c1979
300 _a139 p.
942 _cS