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South African Journal of Plant and Soil -- Vol. 30 No. 1 (2013): Soil colour variation between topsoil and subsoil horizons in a plinthic catena on the Mpumalanga Highveld, South Africa | 27 USD |
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African Journal of Educational Research and Development -- Vol. 12 No. 1 (2019): Teacher quality and students academic achievement in Ondo State. | 27 USD |
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| Total: 54 USD | |||
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