Snellius's notes on the reflection and refraction of rays / J.A. Vollgraff.
In:
Osiris Vol. 1 (1936), p. 715-725, Numero monografico dal tit.: A volume of studies on the history of mathematics and the history of science presented to David Eugene Smith on his 76th birthday, Jan. 21, 1936 / edited by George Sarton
Osiris Vol. 1 (1936), p. 715-725, Numero monografico dal tit.: A volume of studies on the history of mathematics and the history of science presented to David Eugene Smith on his 76th birthday, Jan. 21, 1936 / edited by George Sarton