City of Philadelphia
Subtitle: light emitting diodes for traffic signal displays
By: Urban Consortium Energy Task Force.
Contributors: City of Philadelphia, Pennsylvania.; Public Technology, inc.
Publisher: Public Technology, Inc.
Place of publication: Washington, D.C
Language: eng
Subjects: Light emitting diodes.
Other titles: Light emitting diodes for traffic signal displays.
Notes: "A project of the PTI Urban Consortium Energy Program."

"December 1995."