Bystander intervention and litter control
Subtitle: evaluation of an appeal-to-help program
By: Harriet H. Christensen
Contributors: Pacific Northwest Forest and Range Experiment Station (Portland, Or.)
Series: Research paper PNW -- 287
Publisher: U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station
Published: 1981
Place of publication: Portland, Or
Language: eng
Number of pages: 25
Subjects: Litter (Trash) -- United States; Recreation -- United States -- Management; Helping behavior
Notes: "July 1981."

Bibliography: p. 13-14