A study of trends in total phosphorus measurements at NASQAN stations /

Autor Smith, Richard A., 1945-, Hirsch, Robert M., Slack, James Richard, 1944-
Vydáno 1982

The oilspill risk analysis model of the U.S. Geological Survey /

Autor Smith, Richard A., Slack, James Richard, 1944-, Wyant, Timothy, Lanfear, Kenneth J.
Vydáno 1982