00359nam a22001217a 4500008004100000040005500041080002000096100001700116245003700133260003800170300001100208650001800219230331b        |||||||| |||| 00| 0 eng d  aNational Science LibrarycNational Science Library  aD 77.021:54bK6  aDuffin, G F   aPhotographic emulsion chemistry   aLondon: bThe Focal Press, c1966  a239p.   aPhotographic