Greenland land & cattle company Firs. Jennie E. higby and 2 sons sell ranch more than 11,000 acres, livestock, buildings and equipment for $11.5 million to Greenland Associates, Denver based investment group. Map. RMN 0 15, 1973 p.88 Post 0 14, 1973 p.5E Greenland Ranch land in Douglas County, CO may sit on top of petroleum reserves. RMBJ S 9, 1985 p.1,4 rocky mountain business journal