NELSON, ALFRED L.
Plane and spherical trigonometry, with five place tables, by Alfred L. Nelson & Karl W. Folley.
NELSON, ALFRED L. Plane and spherical trigonometry, with five place tables, by Alfred L. Nelson & Karl W. Folley. © 1May36; A95007. Elsie M. Nelson (W); 23Jul63; R319235.
Elsie M. Nelson|W