TY  - BOOK
AU  - Tholfsen,Trygve R.
TI  - Historical thinking: an introduction
AV  - D 16 T451h 1967
U1  - 907.2 
PY  - 1967///
CY  - New York
PB  - Harper & Row
KW  - History
KW  - Methodology
N1  - Includes bibliographies
ER  -