Directory of special libraries and information centers / edited by Margaret L. Young and Harold C. Young, [Lois Lenroot-Ernt, associated editor, Brigitte T. Darnay ... et al., assistant editors]. 5th ed.
Directory of special libraries and information centers / edited by Margaret L. Young and Harold C. Young, [Lois Lenroot-Ernt, associated editor, Brigitte T. Darnay ... et al., assistant editors].