Fergusson's Percentage Trigonometry John Coleman Fergusson Published: 1914 Total Pages: 176 Get eBook
Fergusson's Percentage Unit of Angular Measurement John Coleman Fergusson Published: 1912 Total Pages: 558 Get eBook
Bulletin of the American Mathematical Society American Mathematical Society Published: 1915 Total Pages: 660 Get eBook
Bulletin (new Series) of the American Mathematical Society Published: 1915 Total Pages: 568 Get eBook