Gaya APA

Wingate-Hill, , R. (1978). Tillage Requirements for Cereal Crop Production and Their Relationship to the Development of New Tillage Machinery . : s.n..

Gaya MLA

Wingate-Hill, , R.. "Tillage Requirements for Cereal Crop Production and Their Relationship to the Development of New Tillage Machinery". : s.n., 1978. Computer Software.