NEW YORK (Reuters) - Singer Mary Travers, 68, of Peter, Paul & Mary fame, is undergoing chemotherapy for a form of leukemia, but she is expected to be in full remission within a few months, her publicist said on Tuesday. "Mary looks forward to touring again with the trio soon, and is grateful for the well wishes that have come to her from all over the world," the statement said. No other details were released. The folk trio, which also includes Peter Yarrow and Noel Paul Stookey, is known for such hits as "Blowin' in the Wind" and "Puff The...