Letter to the Editor - A Family of Queuing Problems. - Philip M. Morse; H. N. Garber; M. L. Ernst (Oper. Res., 1954)

"Centralization of document searching facilities". - M. L. Ernst; Vincent E. Giuliano; Paul E. Jones Jr. (Commun. ACM, 1965)

Response by Ernst, Giuliano and Jones. - M. L. Ernst; Vincent E. Giuliano; Paul E. Jones Jr. (Commun. ACM, 1965)