TY  - BOOK
AU  - WILLIAM L. ALLEN EDITOR ETC
TI  - NATIONAL GEOGRAPHIC MAY 1996
T2  - VOL. 189 NO.5 1996
U1  - 050.8 NG v.05 1996 
PY  - 1996///
CY  - 
PB  - NATIONAL GEOGRAPHIC SOCIETY
KW  - 连续性出版品; 期刊--NATIONAL GEOGRAPHIC
ER  -