TY  - BOOK
AU  - Robertson, 1943- 
TI  - Perceived exertion for practitioners : rating effort with the OMNI picture system 
SN  - 0736048375 
U1  - 612.044 ROB 2004 
PY  - 2004///
CY  - Champaign
PB  - Human Kinetics
KW  - Exercise
KW  - Measurement
KW  - Psychological aspects
KW  - Perception
KW  - Physical fitness
KW  - Rehabilitation
KW  - methods
N1  - Includes index p.165 - 170
ER  -