Letters regarding UCD Position, etc. 1962-1967

Correspondence 1969-1990

Seaman-Lang Duckweed Project 1964

Teacher notes 1993

Nomination materials - distinguished teaching awards 1987

Appointment letters and job correspondence 1962-1981

Guggenheim and Sabbatical leave 1968-1969

Published papers 1961-1985

Career 1961-1987