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
621.326021 IS:418-1963 C14469
Indian Standards Institution Specification for tungsten filament general service electric lamps 2nd rev. - New Delhi ISI 1963 24p. * Incandescent lighting Standards