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Zulfaqar, bin Sa'adi (2008) Effect Of Nitrohumic Acid Derived From Low-Rank Coal Of Sarawak On Growth Of Brassica Oleracea Sp. [Final Year Project Report] (Unpublished)
Zulfaqar, bin Sa'adi (2011) Soil physicochemical properties after establishment of oil palm plantation in peat swamp forests at Mukah, Sarawak. Masters thesis, Universiti Malaysia Sarawak, UNIMAS.