Campbell, K. O. (1958). An economic study of pasture improvement on some farms in New South Wales. University of Sydney, Dept. of Agricultural Economics.
Lua i Stíl Chicago (17ú heag.)Campbell, Keith O. An Economic Study of Pasture Improvement on Some Farms in New South Wales. Sydney: University of Sydney, Dept. of Agricultural Economics, 1958.
Lua MLA (8ú heag.)Campbell, Keith O. An Economic Study of Pasture Improvement on Some Farms in New South Wales. University of Sydney, Dept. of Agricultural Economics, 1958.
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