TY  - SER
AU  - Gupta N.
TI  - Solutions to differential equations: (including calculus of variations) 
AV  - QA 371 GUP
CY  - New Delhi
PB  - LAXMI PUBLICATIONS (P) LTD.
KW  - Differential equations - textbooks
KW  - Differential equations, partial - textbooks
ER  -