Improving concentration : evaluating and improving concentration and performance /
Bailey, Roy D.
Improving concentration : evaluating and improving concentration and performance / Roy D. Bailey and Elvie Brown - London : Speechmark , 2015 - viii, 1544 pages : colour illustrations ; 26 cm.
Includes bibliographical references
9780863889103 (cased)
Concentration
Improving concentration : evaluating and improving concentration and performance / Roy D. Bailey and Elvie Brown - London : Speechmark , 2015 - viii, 1544 pages : colour illustrations ; 26 cm.
Includes bibliographical references
9780863889103 (cased)
Concentration