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
Twitchell, Karl Saben,, 1885- Keith Arnold in mining engineering / by Karl S. Twitchell with Robert Wyndham. - New York : Dodd, Mead, 1955. 183 p. ; 21 cm.