TY - BOOK AU - Chester, Clive R. AU - ED - ED - ED - ED - SN - 2 PY - 1970///.;copyright 1971.46 CY - New York PB - McGraw-Hill KW - KW - 2 KW - 0 KW - 6 KW - 20 KW - Differential equations, Partial N1 - Bibliography: p. 419-431; 5 ER -