TY  - BOOK
AU  - Grosvenor,Gilbert
TI  - Cumulative index to the National geographic magazine 1899 o 1936 inclusive
U1  - 910.6 
PY  - 1937///
CY  - Washington
PB  - National Geographic Society
KW  - National Geographic Society
KW  - History
KW  - Organisation
KW  - Research
ER  -