TY  - BOOK
AU  - Hacker,Louis Morton
AU  - Zahler,Helene Sara
TI  - The United States in the 20th century
AV  - E741 .H27
U1  - 973.91 
PY  - 1952///]
CY  - New York
PB  - Appleton-Century-Crofts
KW  - United States
KW  - History
KW  - 20th century
KW  - Local
N1  - Bibliography: p. 639-678
ER  -