Phillips, H. B. (Henry Bayard) 1881- creator text nyu New York John Wiley & Sons 1956 1951 3rd ed. monographic eng vii, 149 p. : ill. ; 25 cm. by H.B. Phillips. Includes Index Use copy Restrictions unspecified star MiAaHDL Differential equations 515.35 PHD 1956 Use copy MiAaHDL OCLCE 160901 20211209075709.0 51661 eng