Penilaian Hidrofobisitas Gambut Obrogen Pontianak akibat Variabilitas Muka Air Tanah dan Penggunaan Lahan=Hydrophobicity Assessment of Ombrogenous Peat Soils from Ponttanak Effect by Variability of Ground Water Table and - Perpustakaan UGM, i-lib ([Yogyakarta] : Universitas Gadjah Mada, 2005)