00539nam a2200181 a 4500 20230110145411.0 090704s1991 caua g 000 0 eng d 1560520736 BF637.S8 H615 1991 Horn, Sam. Concentration! : how to focus for success / Sam Horn. Los Altos, Calif. : Crisp Publications, c1991. iii, 92 p. : ill. ; 26 cm. Attention. Mental discipline. Success Psychological aspects. lcc 52785 52785 0 0 lcc 0 0 FUJM FUJ FUJ 2023-01-10 0 0255914 2023-01-10 00:00:00 1 2023-01-10 BK VIRTUAITEM