Actions for Conservation of mineral rights underlying farm lands : hearing before the subcommittee of the Committee on Banking and Currency, United States Senate, Seventy-second Congress, second session, on S. J. Res. 247 a joint resolution to provide protection and relief to farmers by aiding them to conserve and liquefy their mineral rights through recognized and established cooperative agencies engaged in the pooling of mineral rights underlying farm lands, February 24, 1933