(Cowlitz County, WA)  --  A body that was found in the Cowlitz River is believed by authorities to be that of a missing Centralia, Washington woman.  Lewis County sheriff's deputies say fishermen found the body yesterday, just southwest of a creek which flows into the Cowlitz River near Vader, Washington.  Officials say the clothing on the body matches the clothing last seen worn by 33-year-old Elizabeth Pham, who disappeared on October 10th.  Authorities say people who spotted Pham after her disappearance reported that she displayed "unusual and confused" behavior.