Title: Competitive Intelligence
Author: Burton H. Alden
Alden, Burton H. (1959), et al. Competitive Intelligence: Information, Espionage, And Decision-Making: A Special Report for Businessmen. Watertown, MA: C. J. Associates
Date Posted: July 25, 2016
Reviewed by Paul W. Blackstock and Frank L. Schaf
A study prepared by students of the Harvard Graduate School of Business. Based on responses from two hundred top-level executives, it shows thot 27 percent knew of instances of spying in their busineses and 20 percent thought that the practice was increasing.
 Blackstock, Paul W. (1978) and Frank L. Schaf, Jr. Intelligence, Espionage, Counterespionage, And Covert Operations: A Guide to Information Sources. Detroit: Gale Research Co., p. 134