TY  - BOOK
AU  - Bailey,Roy D.
AU  - Brown, Elvie
TI  - Improving concentration: evaluating and improving concentration and performance 
SN  - 9780863889103 (cased)
PY  - 2015///
CY  - London
PB  - Speechmark
KW  - Concentration
N1  - Includes bibliographical references
ER  -