00434nam a22001457a 4500008004100000040005500041080001500096100001900111245004200130250001400172260003800186300001100224490003500235650001800270230331b        |||||||| |||| 00| 0 eng d  aNational Science LibrarycNational Science Library  aD 77.023.4  aJacobson, C I   aDeveloping: bThe negative-technique   a15th ed.   aLondon: bThe Focal Press, c1959  a332p.   aThe manual of photo-technique   aPhotographic