Early Twentieth Century

views updated

Early Twentieth Century

"Star Spectral Classification Chart" Annie Jump Cannon and Harvard University (1918–)...[57]
"What Is the Theory of Relativity?" Einstein, Albert (1919)...60
"On the Discovery of Radium" Curie, Marie (1921)...63
"My Acquaintance with Zoological Park Animals" Keller, Helen (1923)...66
"June Skies" Keller, Helen (1932)...69

About this article

Early Twentieth Century

Updated About encyclopedia.com content Print Article