TY  - SER
AU  -  Luther, Martin, 
TI  -  Concerning Christian Liberty; with Letter of Martin Luther to Pope Leo X. 
AV  - BR 
PY  - 2006///
PB  -  Project Gutenberg, 
KW  -  Reformation -- Germany
N1  -  Public domain in the USA;  Text
UR  -  http://www.gutenberg.org/ebooks/1911
ER  -