Timmerman, Charles Exercise your Executive Brain: 500 games,puzzles ,and activities to get in mental shape on the job - NA - New York: Mc Graw HIll ,2011. - 142p. N.A Original NA ISBN: 9780071752251 Subjects--Personal Names: Humanities & Natural Science Subjects--Topical Terms: Arts and Recreation Dewey Class. No.: 793.74 TIM