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- [41] Most U.S. recovered paper prices for mills hold in place without change, but OCC level declines slightly [J]. Pulp and Paper Week, 2004, 26 (30):
- [42] Sulfur dioxide and nitrogen oxides emissions from U.S. pulp and paper mills, 1980-2005 [J]. Journal of the Air and Waste Management Association, 2007, 57 (08): : 901 - 906
- [43] Generation remains steady for U.S. recovered paper; prices increase slightly on OCC, hardly change on most materials [J]. Pulp Pap Week, 2006, 14 (1+9):
- [45] U.S. publication paper markets struggle into summer [J]. Walden's Paper Report, 2001, 31 (13): : 2 - 3
- [46] U.S. publication paper markets struggle into summer [J]. Walden's North American Pulp Paper Report, 2001, 3 (19):
- [48] U.S. Pulp market prices steady to begin the year [J]. Walden's North American Pulp Paper Report, 2002, 4 (02):