00444nam a2200193Ia 4500 OSt 20251118151343.0 250729s1981 xx 000 0 und d 978-0895050595 AL eng 158.1 OLEP Oleksy Walter G 224504 The power of concentration Texas 1981 194p Psychology 224505 ddc BED 236443 236443 0 0 0 0 AL AL 2025-07-29 Management Books 2.00 0 158.1 OLEP BED01762 2025-07-29 16:54:50 1.95 2025-07-29 BK