@book{simmons:1972:de,
    author = {Simmons, George F.},
     title = {Differential Equations with Applications and Historical Notes},
      note = {International Series in Pure and Applied Mathematics},
 publisher = {McGraw-Hill Book Co.},
   address = {New York},
      year = {1972},
     pages = {xvii+465},
   mrclass = {34-01},
  mrnumber = {MR0499365 (58 \#17258)},
mrreviewer = {J. S. Joel},
     zblno = {0231.34001}}