Rietz, H.L.
Plane and Sphenrial trigonometry - 1st ed. - New York The macmillan company 1945 - xi, 167p.
Trigonometry
514.5 / RIE/1945
Plane and Sphenrial trigonometry - 1st ed. - New York The macmillan company 1945 - xi, 167p.
Trigonometry
514.5 / RIE/1945