Mechi's experience in drainage ... [with] his letters ... likewise his speech on ... agriculture,

Mode of access: Internet.

Subsurface mapping.

Mode of access: Internet.

Terrain features of drainage basins in the Sierra Nevada west-side snow zone /

Mode of access: Internet.

Classifications and standards of quality and purity for fresh surface waters of the Chemung River drainage basin, except Newtown Creek drainage basin,

Mode of access: Internet.

Reservoir sedimentation in the Sacramento-San Joaquin drainage basins, California /

At head of title: U. S. Dept. of Agriculture. Soil Conservation Service.