Nitrification in Sudan soil
Martin, F.J., Massey, R.E.
Nitrification in Sudan soil - Khartoum 1914 - 1-25 p. - Soil Sudan Goverment Chemical Section. Publication No. 29 .
Nitrification in Sudan soil - Khartoum 1914 - 1-25 p. - Soil Sudan Goverment Chemical Section. Publication No. 29 .