000			00314nam a2200121Ia 4500
999			_c8876 _d8876
082			_a571.9 H82B
100			_aSmith,C.Horton
245			_aBiological aspects of the transmission of disease
260			_aLondon _bOliver and boyd _c1957
300			_a184p.
650			_aCommunicable diseases-biology
942			_2ddc _cC