Bridge approaches--Maintenance and repair.; Bridges--Design and construction.; Concrete slabs--Maintenance and repair.; Concrete bridges--Floors--Maintenance and repairs.; Settlement (Structures); Maintenance practices.
A symposium entitled "Recent Advances in Middle Carboniferous Biostratigraphy" was held at Stillwater, Oklahoma, on March 5, 1990 , as part of the annual meeting of the South-Central Section, Geological Society of America.