Briggs, D. J., & Courtney, F. M. (1985). Agriculture and environment: The physical geography of temperate agricultural systems. Longman.

Briggs, David J., and Frank M. Courtney. Agriculture and Environment: The Physical Geography of Temperate Agricultural Systems. London ; New York: Longman, 1985.

Briggs, David J., and Frank M. Courtney. Agriculture and Environment: The Physical Geography of Temperate Agricultural Systems. Longman, 1985.