Environment; Pollution; Air; Health
Bicycles; People; Factories; Gas masks; Athletes; Medical equipment & supplies
Duffy, Brian, 1955-
University of Iowa. Libraries. Special Collections Dept.
Educational use only, no other permissions given. Copyright to this digital object is owned by The Des Moines Register; it may not be downloaded, reproduced, or distributed without written permission. For more information, contact the Special Collections Department.