TY  - BOOK
AU  - WILLIAM GRAVES, EDITOR ETC.
TI  - NATIONAL GEOGRAPHIC SEPTEMBER 1994
T2  - VOL. 186 NO.3 1994
U1  - 050.8 NG v.09 1994 
PY  - 1994///
CY  - 
PB  - NATIONAL GEOGRAPHIC SOCIETY
KW  - 连续性出版品; 期刊--NATIONAL GEOGRAPHIC
ER  -