TY  - GEN
AU  - à®¹à®¾à®¯à®¿à®²à¯, à®à®ªà®¿à®°à®à¯
TI  - à®µà®¾à®©à®µà®¿à®¯à®²à®¿à®©à¯ à®à®²à¯à®²à¯à®à®³à¯
U1  - 525 
PY  - 1972///
CY  - New Delhi
PB  - Tamil Nadu Textbook Society
KW  - Astronomy
ER  -