Pipe Spring National Monument (N.M.), interim interpretive plan, second draft (1977) B1; Master plan (1978) B2; Development concept plan, environmental assessment (EA) B3; Statement for management (1981) B4; Record of decision, draft development concept plan and Finding of no significant impact (FONSI) (1982) : environmental impact statement.

Mode of access: Internet.

Innovative concepts and technology for railroad-highway grade crossing motorist warning systems. Vol. I: overview and concept generation and analysis. Final report.

Transportation Systems Center, Cambridge, Mass.