TY  - BOOK
AU  - Humphreys, Christmas
AU  - Concentration and meditation : a manual of mind development
TI  - Concentration and meditation : a manual of mind development 
SN  - 0 14 021236 1
PY  - 1968///
CY  - Baltimore 
PB  - Penguin Books 
KW  - Zen Buddhism
KW  - Buddhist philosophy
N1  - Includes index
ER  -