APA

Spannagel D., Davis R. & Bacher A. (1973). Structural behavior of a flexible metal culvert under a deep earth embankment using method a backfill. Sacramento, Cal: California. Division of Highways. Report 624111-73-6.

Chicago

Spannagel DW, Davis RE and Bacher AE. 1973. Structural behavior of a flexible metal culvert under a deep earth embankment using method a backfill. Sacramento, Cal: California. Division of Highways. Report 624111-73-6.

Harvard

Spannagel D., Davis R. and Bacher A. (1973). Structural behavior of a flexible metal culvert under a deep earth embankment using method a backfill. Sacramento, Cal: California. Division of Highways. Report 624111-73-6.

MLA

Spannagel DW, Davis RE and Bacher AE. Structural behavior of a flexible metal culvert under a deep earth embankment using method a backfill. Sacramento, Cal: California. Division of Highways. Report 624111-73-6. 1973.