#E.5129A 18 Einstein, Albert, 1879- Ather und relativitiits-theorie; rede gehalten am 5, mai 1920 an der Reichs-universitit zu Leiden, von Albert Einstein, Ber- lin, J. Springer, 1920.
15, (1) p. 22".
1. Ether (of space) 2. Relativity (Physics) L Title. 22-29697
Library of Congress QC1T7.E5 (3)