@misc{Robbins_Edward_Rutledge_(1870-1941)._Plane,
 author={Robbins, Edward Rutledge (1870-1941).},
 howpublished={online},
 publisher={American Book Company},
 language={eng},
 type={książka},
 type={dokument piśmienniczy},
 title={Plane trigonometry},
}