00346nam a22001217a 4500008004100000040005500041080001600096100002300112245002200135260003900157300001100196650001700207230331b        |||||||| |||| 00| 0 eng d  aNational Science LibrarycNational Science Library  aD 771.3bJ8  aBomback, Edward S   aContaflex manual   aLondon: bFoundation Press, c1958  a256p.   aPhotography