TY - BOOK AU - Lopez, Velazquez Gustavo AU - Lopez, Velazquez Gustavo TI - Partial differential equations of first order and their applications to physics SN - 9789810237462 AV - 515.353 LOP 1999 U1 - 515.353 LOP 1999 PY - 1999/// CY - Singapore PB - World scientific KW - Mathematics ER -