TY  - GEN
AU  - Mohammad Shafi Khan 
TI  - An introduction to cosmology
SN  - 9789390970209
U1  - E 523.1 23rd ed. 
PY  - 2021///
CY  - Kolkata
PB  - Asian Book Press
KW  - Cosmology
N1  - Includes bibliographical references and index
ER  -