TY  - BOOK
AU  - Wood,Ernest
TI  - Concentration: an approach to meditation 
T2  - Quest book
SN  - 9780835601764
AV  - BF 321 W66
PY  - 2010/// y 2018],
CY  - Wheaton, Illinois
PB  - Theosophical Publishing House
KW  - Meditación
KW  - Atención
ER  -