TY  - BOOK
AU  - Howlader, sushil ranjan.
TI  - Nature, course, and causes of change in social systems and civilization: a utilitarianistic analysis of human history 
SN  - 9789849364665
U1  - 301 23
PY  - 2022///
CY  - Dhaka
PB  - A H Development publishing house
KW  - Social system civilization
ER  -