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
681.2021 IS:1957-1961 C14389
Indian Standards Institution Specifiction for primatic compasses, non liquid New Delhi ISI 1962 6p. * Primatic compasses Scientific measuring instruments Standard