TY  - BOOK
AU  - WILLIAM GRAVES, EDITOR ETC.
TI  - NATIONAL GEOGRAPHIC SEPTEMBER 1992
T2  - VOL. 182 NO.3  1992
U1  - 050.8 NG v.09 1992 
PY  - 1992///
CY  - 
PB  - NATIONAL GEOGRAPHIC SOCIETY
KW  - 连续性出版品; 期刊--NATIONAL GEOGRAPHIC
ER  -