Joshua Summit

Urban tree-planting programs — A model for encouraging environmentally protective behavior

Joshua Summit, Robert Sommer, R. Sommer, 1998 .

SOCIAL BENEFITS OF RESIDENT INVOLVEMENT IN TREE PLANTING: COMPARISON WITH DEVELOPER-PLANTED TREES

Joshua Summit, Matthew Tirrell, Robert Sommer, 1994 .

Public Involvement with Elms and Other Species

Joshua Summit, Robert O. Sommer, R. Sommer, 2000 .

Slide Ratings of Street Tree Attributes: Some Methodological Issues and Answers

Joshua Summit, Robert Sommer, Amy Clements, 1993, Landscape Journal.

Further Studies of Preferred Tree Shapes

Joshua Summit, Robert Sommer, R. Sommer, 1999 .