Online Public Access Catalogue (OPAC)Library,Documentation and Information Science Division
“A research journal serves that narrow
borderland which separates the known from the unknown”
-P.C.Mahalanobis
604.2 Spence, William Perkins,, 1925- Drafting technology and practice / by William P. Spence. - Rev.. - Peoria, Ill. : C.A. Bennett Co., c1980. 816 p. : ill. ; 25 cm. Includes index. 0870023039 9780870023033 * Mechanical drawing. Mechanical drawing.
