Modern aids to design and draughting :

Additional authors: Great Britain. National Engineering Laboratory. Machinery Group : Computer-aided Design Division. Series: (NEL report ; . no. 347). Published by : The Ministry, ([London] :) Physical details: iv, 156 p. : ill. Subject(s): Design -- Addresses, essays, lectures. | Drawing -- Addresses, essays, lectures. Year: 1968 Reviews from LibraryThing.com: