Friedrichs, K. O. (Kurt Otto) From pythagoras to einstein / by K.O. Friedrichs - Washington, D.C. : Mathematical Association of America, 1965 - vii, 88 p. : ill. ; 23 cm. - New mathematical library 16 . - New mathematical library 16 . LCCN: 65-24963 Subjects--Topical Terms: Pythagorean propositionDynamicsRelativity (Physics)Vector analysis