Trignometry for secondary schools
Subtitle: plane and spherical
By: [by] Charles H. Butler [and] F. Lynwood Wren.
Contributors: Wren, Frank Lynwood, 1894- joint author.
Edition: 2d ed.
Publisher: Heath
Published: 1957
Place of publication: Boston
Language: eng
Number of pages: 360
Subjects: Trigonometry.