TY  - SER
AU  -  Unknown
TI  -  周髀算經 
AV  - QA 
PY  - 2004///
PB  -  Project Gutenberg, 
KW  -  Mathematics, Chinese -- Early works to 1800
N1  -  Public domain in the USA;  Text
UR  -  http://www.gutenberg.org/ebooks/12408
ER  -