Contributions to the theory of partial differential equations
S. Bergman ... [et al.] ; edited by L. Bers, S. Bochner and F. John.
Princeton, New Jersey : Princeton University Press, 1954.
v, 257 págs. ; 26 cm.
Serie: Annals of mathematics studies ; no. 33
"Papers ... read at the Conference on Partial Differential Equations, sponsored by the National Academy of Sciences, National Research Council, October 1952."