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Box breathing/

Ryan, George

Box breathing/ by George Ryan - California: Bobit Business Media, 2017 - page 72-75 - Vol.41 No.1 (January 2017) - Police the law enforcement magazine page 72-75 Vol.41 No.1 0893-8989 .

0893-8989


Police - Physical fitness

BPer. 363.205 / P75