TY  - BOOK
AU  - Struve,Otto
AU  - Zebergs,Velta
TI  - Astronomy of the 20th century
U1  - 520.904 
PY  - 1962///
CY  - New York
PB  - Macmillan
KW  - Astronomy
KW  - History
N1  - Includes bibliographical references and index
ER  -