In 1961 another of her books, The Mathematical Theory of Viscous Incompressible Flow was an outstanding success in the area of nonlinear problems of mathematical physics and has since become a classic.
Sa 1961 iba ng kanyang mga libro, matematiko Ang teorya ng malapot Incompressible daloy ay isang natitirang tagumpay sa lugar ng nonlinear problema ng matematika at pisika ay dahil maging isang klasikong.