Guidelines for the inclusion of left-turn lanes at rural highway intersections:
final report,
by S.L. Ring and R.L. Carstens.

APA Citation

Iowa State University Engineering Research Institute. (1970). Guidelines for the inclusion of left-turn lanes at rural highway intersections: final report. .

MLA Citation

Iowa State University Engineering Research Institute. Guidelines for the Inclusion of Left-turn Lanes At Rural Highway Intersections: Final Report. , 1970.

Warning: These citations may not always be complete (especially for serials).