514
  Kell
  P
         Kells , Lyman Morse , 1888 - Plane and apherical trigonometry [by] Lyman M . Kells , Willis F . Kern [and] James R . Bland . 3d . ed . New York , McGraw-Hill , 1951 . 276 p . ilus . tablas . 24 cm . Publicada con la obra del autor . Five-place logarithmic and trigonometrio tables . New York , 1935 .