%0 Conference Proceedings %B ACM SIGDOC 1999: Proceedings of the 17th Annual International Conference on Computer Documentation %D 1999 %T Constructing usable documentation: A study of communicative practices and the early uses of mainframe computing in industry %A Zachry, M %B ACM SIGDOC 1999: Proceedings of the 17th Annual International Conference on Computer Documentation %I ACM %C New York %P 22-25 %G eng