(1996). PENAC "P": A new soil conditioning system without chemicals for agriculture and horticulture. Grecia, C.R.: Ponderco S.A..
Citación estilo ChicagoPENAC "P": A New Soil Conditioning System Without Chemicals for Agriculture and Horticulture. Grecia, C.R.: Ponderco S.A., 1996.
Cita MLAPENAC "P": A New Soil Conditioning System Without Chemicals for Agriculture and Horticulture. Grecia, C.R.: Ponderco S.A., 1996.
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