Denver real estate investment fund Van Schaack and Company marks 50th anniversary by settin up real estate investment trust, Denver Real Estate In- vestment Fund. Post May 21, 1961 p.jD RMN May 21, 1961 p.44 . Purchases Allstate Insurance Co. building and Professiona $ Arts Medical Center. 8MN Dec. 3, 1961 g.6 Citk's first real estate investment trust buys apartments RMN, January 7, 1962, P-51 Post, January 7, 1962, P 3D Buys Continental Oil Building at l8th St. and Glenarm Pl. Post Jan. 9, 1963 p.45