Modern mathematics for the engineer - Weller, Royal; Lefschetz, Solomon; Bellman, Richard; Green, John W; Hestenes, Magnus R; Courant, Richard; Schiffer, Menahem M; Sokolnikoff, Ivan S; Wiener, Norbert; Bohnenblust, H., Frederic; King, Gilbert W; Brown, George W; et al. (University of California Engineering Extension Series, 1956)