TY  - BOOK
AU  - National Philatelic Museum
AU  - Kleinwaechter,Ludwig
TI  - Austria centenary stamp exhibition: March 18 to April 13, 1950 
T2  - Official bulletin / National Philatelic Museum
PY  - 1950///]
CY  - Phila., Pa.
PB  - National Philatelic Museum
KW  - Postage stamps
KW  - Austria
N1  - Cover title: Austria
ER  -