Oluf Chr. Bockman. (1990). Agriculture and fertilizers: Fertilizers in perspective. Norway: Norsk Hydro a.s.
Citación estilo ChicagoOluf Chr. Bockman. Agriculture and Fertilizers: Fertilizers in Perspective. Norway: Norsk Hydro a.s, 1990.
Cita MLAOluf Chr. Bockman. Agriculture and Fertilizers: Fertilizers in Perspective. Norway: Norsk Hydro a.s, 1990.
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