Easy numerical trigonometry / by H.S. Carslaw. Carslaw, H. S. (Horatio Scott), 1870-1954. Trigonometry Problems, exercises, etc. Juvenile literature. 514 19 CAE Based upon author's Easy numerical trigonometry of the right-angled triangle. Sydney : Angus & Robertson, 1916 1916 1944 Text 160 p. : eng