APA

Shackel B., . (1980). Experimental investigation of the roles of the bedding and jointing sands in the performance of interlocking concrete block pavements subjected to traffic. Pretoria: National Institute for Transport and Road Research. RR 286.

Chicago

Shackel B, . 1980. Experimental investigation of the roles of the bedding and jointing sands in the performance of interlocking concrete block pavements subjected to traffic. Pretoria: National Institute for Transport and Road Research. RR 286.

Harvard

Shackel B., . (1980). Experimental investigation of the roles of the bedding and jointing sands in the performance of interlocking concrete block pavements subjected to traffic. Pretoria: National Institute for Transport and Road Research. RR 286.

MLA

Shackel B, . Experimental investigation of the roles of the bedding and jointing sands in the performance of interlocking concrete block pavements subjected to traffic. Pretoria: National Institute for Transport and Road Research. RR 286. 1980.