Ump·qua River 
(ŭmpkwô′)
(ŭmpkwô′) A river, about 180 km (110 mi) long, of southwest Oregon rising in two branches and flowing north and west to the Pacific Ocean.
- calcium fluoride
- calcium hydroxide
- calcium hypochlorite
- calcium light
- calcium nitrate
- calcium oxide
- calcium phosphate
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