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U <br />COLORADO YAMPA COAL, FOIDEL CREEK NEAR MINES 1 & ECKMAN PARK <br />MEAN QUARTERLY MANGANESE <br />~o <br />;~ f r1~ ~i <br />1 ~, ~~, ~ ~ ~ ~ ~ ~ <br />1 1 ; <br />1 1 I <br />1 l I <br />~1 ~ ~I <br />'~~/ I <br />II <br />b <br />1 <br />,oo <br />w <br />n <br />m <br />w <br />1980 1981 1982 19 B 3 1984 1985 19 B 6 1987 1988 1989 1990 1991 <br />Legend <br />o t4. Tolal <br />O 14, fof_Rec. <br />* B, Totol_ _ <br />r g, Toi. Ree. <br />• <br />