TY - BOOK AU - Einstein,Albert TI - Relativity: the special and the general theory : a popular exposition SN - 0517025302 (pbk.) AV - QC 6 E35r 1961 U1 - 530.01 PY - 1961/// CY - New York PB - Crown Publishers KW - Relativity (Physics) KW - Relatividad (FĂ­sica) N1 - Includes bibliographical references (p. 158-159) and index ER -