John R Schafer

Discrete-Time Signal Processing (International Edition) by Alan V. Oppenheim,Ronald W. Schafer,John R. Buck Pearson Education Paperback 1 December 1998 from£N/A | RRP: ~~£57.99~~
Advanced Interviewing Techniques: Proven Strategies for Law Enforcement, Military, and Security Personnel by John R. Schafer,Joe Navarro Charles C Thomas Pub Ltd Paperback 1 January 2004 from£N/A | RRP: ~~£22.53~~
Advanced Interviewing Techniques: Proven Strategies for Law Enforcement, Military, and Security Personnel by John R. Schafer,Joe Navarro Charles C Thomas Pub Ltd Hardcover 1 January 2004 from£68.78 | RRP: ~~£35~~