1. Calculus of Variations, Lecture Notes, Institute of Mathematical Sciences, New York University, New York, 1945–6 (including supplementary notes by H. Rubin and M. Kruskal, 1949-50).
2. and , Methods of Mathematical Physics, First English edition, Interscience, New York-London, Volume I, 1953, Volume II, to appear. (Volume II in German, Springer, Berlin, 1937.)
3. Lectures on Cauchy's Problem in Linear Partial Differential Equations, Yale University Press, New Haven, 1921; reprinted by Dover, New York.
4. The Variational Principles of Mechanics, Mathematical Expositions No. 4, University of Toronto Press, Toronto, 1949.
5. Mechanics Lectures on Theoretical Physics, Vol. I, English translation, Academic Press, New York, 1952.