6[1]Goldstein; I. S. New technology for new uses of wood[J]. Tappi,1980,63(2):105-108.
7[2]Hergert, H. L., Van Blaricom, L. E.,Steinberg,J. L., and Gary, K. R. Isolation and properties of dispersants from Western Hemlock bark[J]. For. prod. J. 1965,15:485-491.
8[3]Maloney, G. T. Chemicals from pulp and Wood Waste. Production and Applications. Noyes Data Corp., Park Ridge, New jersey. 1978.
