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
973/.099 B Klein, Aaron E. The hidden contributors: Black scientists and inventors in America [by] Aaron E. Klein. - [1st ed.]. - Garden City, N.Y., Doubleday, 1971. xiii, 203 p. illus. 22 cm. Copy 3 is an ordered replacement copy for copies 1 and 2 which are not on the shelf. * African American inventors. African American scientists.
