 a graphic catalog card index to improv access mainten art slide unit state militari academi librari west point model card graphic imag slide design pertin identifi displai directli black-and-white opaqu photo kei-punch the card serv ampl comparison refer previou handl slide produc subject-arrang permut book form the permit access approach form geograph area time origin artist school style some advantag common kind graphic collect detail estim cost photo-reproduct origin card kind copi comput time materi list futur benefit consist unifi catalog system graphic object dissemin kind network structur indic major goal 