00599nam a2200193Ia 4500 CTU_131654 210402s9999 xx 000 0 und d 712000 515.353 A485 Amaranath, T. An elementary course in partial differential equations T. Amaranath Harrow, UK. Alpha Science International Ltd. 2005 Differential equations, Partial.,Những phương trình vi phân, Riêng Minh Trung tâm Học liệu Trường Đại học Cần Thơ