Transportation safety information report, April, May, and June 1977. Final report.

Transportation Department, Office of the Assistant Secretary for Environment, Safety, and Consumer Affairs, Washington, D.C.

Transportation safety information report, July, August, and September 1977. Final report.

Transportation Department, Office of the Assistant Secretary for Environment, Safety, and Consumer Affairs, Washington, D.C.

Transportation safety information report, October, November, and December 1977 and annual summary. Final report.

Transportation Department, Office of the Assistant Secretary for Policy and International Affairs, Washington, D.C.