TY  - BOOK
AU  - Welker,M.
ED  - International congress on Inland navigation
TI  - Improvement of the fluvial way from rotterdam to the sea: report 
PY  - 1892///
CY  - Paris
PB  - Imperierie Generale Lahure
KW  - Roads
KW  - Design and construction
N1  - 10th question
ER  -