Natural tangents to every second of arc and eight places of decimals.
Computed by Emma Gifford ... From Rheticus.

APA Citation

Gifford, E. (1920). Natural tangents to every second of arc and eight places of decimals. Manchester [Eng.]: Printed by A. Heywood & son ltd..

MLA Citation

Gifford, Emma, 1861-1936. Natural Tangents to Every Second of Arc And Eight Places of Decimals. Manchester [Eng.]: Printed by A. Heywood & son ltd., 1920.

Warning: These citations may not always be complete (especially for serials).