@article{1968-morrison ,note={URL: {\tt http://cr.yp.to/\allowbreak bib/\allowbreak entries.html\#\allowbreak 1968/\allowbreak morrison}} ,author={Donald R. Morrison} ,ISSN={0004--5411} ,journal={Journal of the ACM} ,pages={514--534} ,title={{PATRICIA: practical algorithm to retrieve information coded in alphanumeric}} ,volume={15} ,year={1968} }