Nielsen, K. L.
Plane and spherical trigonometry / K. L.Nielsen. - New York: ARNES & Noble, c1943. - 139 p.: 21 cm.
English
Trigonometry
516.34/NIP
Plane and spherical trigonometry / K. L.Nielsen. - New York: ARNES & Noble, c1943. - 139 p.: 21 cm.
English
Trigonometry
516.34/NIP