Effect of oil pollution on seafowl
Articles discussing Portland sewage disposal issue and Ed F. Averill lecture
Articles
Articles discussing need for Portland sewage system and Pacific College benefit party at Jennings Lodge
Willamette River distress
Columbia River pollution
Articles discussing "Camera hunting along the Rockies to Alaska" lecture and pollution of Willamette River
Articles discussing meeting with Oregon Caveman group and opposition to highway construction between Mount Hood and Crater Lake
"Oregon conquers stream pollution"
Articles discussing river pollution and lecture given by Dr. William Beebe
Articles discussing debate over Willamette Valley project and river pollution
Program and articles discussing Izaak Walton League Oregon State Council Convention
Articles discussing pollution of Columbia and Willamette rivers
Articles authored by William Finley and Ed F. Averill discussing Oregon wildlife
Articles discussing Arthur N. Pack's activities as President of the American Nature Association
Articles discussing Rogue River pollution and dams on the Willamette River
Advertisements and articles discussing William Finley lectures and effects of Columbia River projects on fish populations
Articles discussing Willamette River pollution and hunting pronghorn
Articles describing Willamette River pollution and fishing regulations
Articles describing effects of Willamette River pollution on fish and crayfish
Article discussing effects of dams, diseases, and pollution on salmon populations
Articles discussing pilchard conservation and sewage systems
Articles discussing need for Portland sewage system
Articles
Article discussing Izaak Walton League Oregon State Council Convention
Effect of oil pollution on sea fowl
Articles
Articles discussing William Finley lectures and prospective Portland sewage system