Relativity: The Special and the General Theory

@book{einstein-relativitybook1920,
   apice = {EinsteinRelativitybook1920},
   author = {Albert Einstein},
   booktitle = {Relativity: The Special and the General Theory},
   publisher = {Henry Holt and Company},
   title = {Relativity: The Special and the General Theory},
   year = 1920
}