Professional mail surveys /
Erdos, Paul L.
Professional mail surveys / by Paul L. Erdos, with the assistance of Arthur J. Morgan. - New York : McGraw-Hill, c1970. - xi, 289 p. : illus., forms. ; 26 cm.
Bibliography: p. 276-277 & Includes Index.
070195706
Mail surveys.
Social surveys.
Public opinion polls.
658.83 / ERP 1970
Professional mail surveys / by Paul L. Erdos, with the assistance of Arthur J. Morgan. - New York : McGraw-Hill, c1970. - xi, 289 p. : illus., forms. ; 26 cm.
Bibliography: p. 276-277 & Includes Index.
070195706
Mail surveys.
Social surveys.
Public opinion polls.
658.83 / ERP 1970