http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
proceedings of the II symposium on rapid excavations, October 16-17, 1969
Symposium on Rapid Excavation 1969 : Sacramento, Calif.)
Sponsored by School of Engineering, Sacramento State College ; editor: Howard L. Hartman.
Previous symposium entitled Symposium on R-D in Rapid Excavation.