TY  - SER
AU  -  Bowditch, Charles P. 
TI  -  Was the Beginning Day of the Maya Month Numbered Zero (or Twenty) or One? 
AV  - F1401 
PY  - 2012///
PB  -  Project Gutenberg, 
KW  -  Maya calendar
N1  -  Public domain in the USA;  Text
UR  -  http://www.gutenberg.org/ebooks/39259
ER  -