00325nam a2200121Ia 4500008004100000020002200041082001200063082001000075100001700085245005900102260001400161260002800175230118s9999||||xx |||||||||||||| ||und||  a978-81-7319-519-8  a515.353  bAMA/A  atbamaranath 3aan elementary course in partial differential equations  anew delhi  bnarosa publishing house