Special lecture:
Graphical and numerical methods of solving partial differential equations,
by Hillel Poritsky ... July 18 and 19, 1941.

APA Citation

Poritsky, H., Brown University. Graduate School. (1941). Special lecture: Graphical and numerical methods of solving partial differential equations. [Providence.

MLA Citation

Poritsky, Hillel, 1898-, and Brown University. Graduate School. Special Lecture: Graphical And Numerical Methods of Solving Partial Differential Equations. [Providence, 1941.

Warning: These citations may not always be complete (especially for serials).