Application of surface-geophysical methods to investigations of sand and gravel aquifers in the glaciated northeastern United States /

Mode of access: Internet.

Techniques for assessing sand and gravel resources in glaciofluvial deposits--an example using the surficial geologic map of the Loudon Quadrangle, Merrimack and Belknap counties, New Hampshire /

Mode of access: Internet.

Sand and gravel in California : an inventory of deposits /

Mode of access: Internet.