%0 Journal Article
%T Superimposed punching of numerical codes on hand‐sorted punch cards
%A Perry, James W.
%J Journal of the Association for Information Science and Technology
%V 2
%N 4
%P 205-212
%@ 2330-1635
%D 1951-10-01
%I Wiley Subscription Services, Inc., A Wiley Company
%~ DeepDyve