00583nam a2200193Ia 4500003000900000008004100009040001600050080001200066100001500078245012800093260003400221300001000255490002200265650002300287650001900310650002500329650001600354700001900370IN-BaIIA211028s9999    xx            000 0 eng d  cIIA Library  a77bLAU  aLau, Ernst 0aEquidensitometrybmethods of two dimensional photometry, principles and fields of applicationcErnest Lau and Wolfgant Krug  aLondonbThe Focal Pressc1968  a136p.  aThe Focal Library  aMicrodensitometers  aNASA Thesaurus  aOptical Measurements  aPhotography  aKrug, Wolfgant