The Delaware river basin, physical facts
Subtitle: a graphic compendium containing maps and charts.
Publisher: The Interstate Commission on the Delaware River Basin
Published: 1940
Place of publication: Philadelphia, Pa
Language: eng
Subjects: Delaware River Valley (N.Y.-Del. and N.J.) -- Surveys.
Notes: Loose-leaf.
"Supplementary maps and charts will be issued from time to time for insertion."