After the Flood by Robert Polidori (2006, Hardcover)

Bird Dog Training & Problem Solving by Robert C. Pettit SC 2016

Solving Problem Solving: A Potent Force for Effective Management by Robert L. Fl

Thinking Visually : A Strategy Manual for Problem Solving by Robert H. McKim

Wiley Bulletproof Problem Solving Paperback Book by Charles Conn & Robert McLean

Creative Problem Solving Total Systems Intervention Robert L. Flo

Creative problem solving.: A useful l... by Angear, Bridget Paperback / softback

The Art of Problem-Solving Book by Robert R. Carkhuff 1974 Third Printing Vtg