Natural Resources Research
Natural Resources Research > 2000 > 9 > 2 > 125-134
Natural Resources Research > 2003 > 12 > 4 > 257-272
Natural Resources Research > 2004 > 13 > 1 > 29-43
Natural Resources Research > 2007 > 16 > 2 > 109-119
Natural Resources Research > 2000 > 9 > 2 > 125-134
Natural Resources Research > 2003 > 12 > 4 > 257-272
Natural Resources Research > 2004 > 13 > 1 > 29-43
Natural Resources Research > 2007 > 16 > 2 > 109-119