TY  - BOOK
AU  - Besser, H
TI  - Perseverance: How to develop it
U1  - 170 B464P 
PY  - 2019///
CY  - New Delhi
PB  - Psycho Information Technologies
N1  - 4011 03/02/2020 FP20/599 10/02/2020 Main Budget
ER  -