What is a authentic source from multi-institutional study of just civil engineering BS six years(preferable six year year, but otherwise it is okay) graduation rate in united states four year college and the research is conducted in one of the year in last five years?
If not, does somebody have access to this paper and snapshot a quarter of page from that paper for evidence?
http://ascelibrary.org/doi/abs/10.1061/(ASCE)EI.1943-5541.0000244