Land. Colorado Colorado land board issues new regulations requiring competition in bidding on state land leases. RMN, July 27, 1961, p.20 2,800 acres in Otero County to be auctioned off by Colorado Land Office. RMI, September 11, 1961, p.34 41% Colorado land area is under lease for oil and gas development. RMN, December 20, 1961, p.89 Activities of unethical land promoters in Colorado and New Mexico. Cervi's Journal Aug.-,1.5, 1962 p.1,2 Activities of unethical land promoters. First of series Post Aug. 16, 1962 p.1,20 Cabins in the sky. 2nd in series. Post Aug. 17, 1962 p.l