Cooper, J., & Raymond, W. (1986). Grassland manuring (1st edition.). BGS.
Cita Chicago Style (17a ed.)Cooper, J.P, y W.F Raymond. Grassland Manuring. 1st edition. Hurley: BGS, 1986.
Cita MLA (8a ed.)Cooper, J.P, y W.F Raymond. Grassland Manuring. 1st edition. BGS, 1986.
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