Reference

sanders
@article{sanders,
 author = {Sanders, Norman},
 title = {An industry perspective on the beginnings of CAD},
 journal = {SIGCSE Bulletin},
 volume = {40},
 number = {2},
 year = {2008},
 issn = {0097-8418},
 pages = {128--134},
 doi = {http://doi.acm.org/10.1145/1383602.1383652},
 publisher = {ACM},
 address = {New York, NY, USA},
 }