Hellwig,Gunter. (1964). Partial differential equations: An introduction (1st English translated edition.). Blaisdell Pub. Co.
Chicago Style (17th ed.) CitationHellwig,Gunter. Partial Differential Equations: An Introduction. 1st English translated edition. New York: Blaisdell Pub. Co, 1964.
MLA (9th ed.) CitationHellwig,Gunter. Partial Differential Equations: An Introduction. 1st English translated edition. Blaisdell Pub. Co, 1964.
Warning: These citations may not always be 100% accurate.