Reports, field notes, data, photographs and correspondence with colleagues and others throughout the world pertaining to the following

This series consists of field books and notes containing data entries and analyses pertaining primarily to those lakes in the Qu'Appelle River System

These files consist of correspondence, reports, data, analyses, etc. pertaining primarily to saline lakes on the Prairies

These files contain lecture outlines and schedules, extensive notes and graphics as well as laboratory schedules and experiments. A main file usually is followed by a number of subject-specific or supplementary files

This fonds documents Professor Hammer's research interests (including much data from Saskatchewan and Alberta lakes) and publication record. Also included is material relating to Dr. Hammer's service with such groups as the Water Studies Institute and the Saskatchewan Environmental Society and a file of minutes and memoranda documenting his term as Biology Department Head.

This series contains not only manuscript copies and offprints of U.T. Hammer's publications but one file each on his academic career and his term as Department Head, Biology, 1973-1976

Correspondence pertaining to arrangements, notices, programs, speaking notes, etc. in re: addresses to academic, professional, and public audiences on a variety of subjects relating to ecosystems