Hall, H. S.
Elementary trigonometry / H.S. Hall and S.R. Knight. - 4th rev & enl ed. - London : Macmillan & co., 1959. - 415 p. ; 20 cm.
322 322
Plane trigonometry.
514 / H142e
Elementary trigonometry / H.S. Hall and S.R. Knight. - 4th rev & enl ed. - London : Macmillan & co., 1959. - 415 p. ; 20 cm.
322 322
Plane trigonometry.
514 / H142e