TY  - BOOK
AU  - WILLIAM L. ALLEN EDITOR ETC
TI  - NATIONAL GEOGRAPHIC MAY 2003
T2  - VOL.203 NO.5, 2003
U1  - 050.8 NG v.05 2003 
PY  - 2003///
CY  - 
PB  - NATIONAL GEOGRAPHIC SOCIETY
KW  - 连续性出版品; 期刊--NATIONAL GEOGRAPHIC
ER  -