The heat equation / D. V. Widder. Widder, D. V. (David Vernon), 1898-1990. Heat equation. QA3 .P8 vol. 67 QA377 517.383 WIH Includes index. Bibliography: p. 259-262. New York : Academic Press, 1975. 1975. 1975 Text xiv, 267 p. : eng Pure and applied mathematics, a series of monographs and textbooks ; 67 Pure and applied mathematics (Academic Press) ; 67.