TY - BOOK ID - 1221690 TI - Elementary partial differential equations PY - 1975 SN - 0442300557 0442300565 PB - New York (N.Y.) : Van Nostrand Reinhold, DB - UniCat KW - Partial differential equations KW - Differential equations, Partial. KW - 517.95 KW - 517.95 Partial differential equations KW - Differential equations, Partial UR - https://www.unicat.be/uniCat?func=search&query=sysid:1221690 AB - ER -