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2. Fiber (acid detergent) and lignin in animal feed;AOAC,1990
3. Standard Methods for the Examination of Water and Wastewater;APHA,1998
4. Macrophyte decomposition in two tropical lakes;Ayyappan;Arch. Hydrobiol.,1986
5. Decomposition: how limnologists were led astray by soil ecologists;Bärlocher;Verh. Int. Verein. Limnol.,1998