APA

Halstead P. E., . (1951). The "Covermeter"-apparatus for measuring the depth of reinforcement below the surface of hardened concrete. London: Cement and Concrete Association.

Chicago

Halstead P E, . 1951. The "Covermeter"-apparatus for measuring the depth of reinforcement below the surface of hardened concrete. London: Cement and Concrete Association.

Harvard

Halstead P. E., . (1951). The "Covermeter"-apparatus for measuring the depth of reinforcement below the surface of hardened concrete. London: Cement and Concrete Association.

MLA

Halstead P E, . The "Covermeter"-apparatus for measuring the depth of reinforcement below the surface of hardened concrete. London: Cement and Concrete Association. 1951.