West Linn husband-and-wife musicians Mark Hanson and Greta Pedersen will present a cd release party concert March 4. West Linn’s Grammy-winning guitarist Mark Hanson and National Artist of the Year Greta Pedersen are joining forces with Diana Ross-genre and jazz keyboardist George Mitchell. The husband-and-wife team of Hanson and Pedersen is marking the recent release of their duo album, “Then & Now” with a concert March 4 at Tabor Space in Portland.