About the Author
HARRY S. PARKER (DECEASED) was professor of architecturalconstruction at the University of Pennsylvania.
JOHN W. MACGUIRE (deceased) was professor of architecturalengineering at the University of Pennsylvania.
JAMES AMBROSE has practiced as an architect in California andIllinois and as a structural engineer in Illinois. He recentlyretired as professor of architecture at the University of SouthernCalifornia.