Public buildings and grounds, hearings, 72d Congress, 1st session, on H. R. 9975, relating to contracts for erection or alteration of public buildings, H. R. 10372, to authorize director of public buildings and public parks to employ landscape architects, architects, engineers, artists, or other expert consultants, H. R. 11337, authorizing Secretary of Treasury to exchange Federal building site in Dover, N. J., for another site, Apr. 7-20, 1932.