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
621.3274021 IS:2183-1963 C13607
Indian Standards Institution Schedule for high pressure mercury vapour lamps New Delhi ISI 1963 9p. * Mercury-vapor elctric lighting