TY  - BOOK
AU  - Irala, Narciso
AU  - Irala,Narciso
TI  - Mental Efficiency Without Fatigue
SN  - 8171080170   
U1  - O28 
PY  - 1988///
CY  - Mumbai
PB  - Better Yourself Books
N1  - includes index and biblioraphy
ER  -