00396nam a22001217a 4500008004100000040005500041080002200096100002600118245008200144260002600226300001000252650001200262230606b        |||||||| |||| 00| 0 eng d  aNational Science LibrarycNational Science Library  a614.4:001.5] bL5  aJones, Norman Howard   aScientific background of the international sanitary conferences: b1851-1938   aGeneva: bWHO, c1975  a109p.  aScience