there are two recent publications - pocket size physio reference books - both inlcude a section on these symbols.
The Physiotherapist's Pocketbook - Elsevier
the rival book is the physiotherapy dictionary. http://www.elsevier.com/wps/find/boo...on#description
These pocket books area great idea and include much more great quick reference material. Sometimes the quality of the descriptions or diagrams could be better but still a good buy
Otherwise why don't you look up any of maitland's books on manipulation or Gregory Grieves books.