TY  - GEN
AU  - Bala, A. Usha
TI  - English: A. Usha Bala, Bh. V. Gopinath, G. Vijayasimha Goud, Rukhiya Begum
SN  - 978-93-83640-08-9
U1  - 425 
PY  - 2019///
CY  - Hyderabad
PB  - Spectrum Books (P) Ltd.
ER  -