'C and D. Sectional diagrams of inclosure of Zuid Plas, near Rotterdam, Holland." -Whitney, 1911

Zuidplas

'C and D. Sectional diagrams of inclosure of Zuid Plas, near Rotterdam, Holland." -Whitney, 1911

'C and D. Sectional diagrams of inclosure of Zuid Plas, near Rotterdam, Holland." -Whitney, 1911

Zuidplas

'C and D. Sectional diagrams of inclosure of Zuid Plas, near Rotterdam, Holland." -Whitney, 1911