TY  - BOOK
ED  - United Nations Conference on Trade and Development.
TI  - Port statistics: selection, collection and presentation of port information and statistics : manual 
PY  - 1971///
CY  - New York
PB  - United Nations
KW  - Harbors
KW  - Statistics
N1  - 'United Nations publication. Sales no.: E.72.II.D.1.'
ER  -