A circa-'75 site plan shows original store block designations in green. The circa-1954 mall encompassed Building A through F.  Buildings G and H were added in the early '60s, with Building I completed in 1969. By the time of the 1970s enclosure (in lighter gray), these designations were becoming redundant.
    

An aerial view from the mid-1970s shows the sheer size of the sprawling shopopolis. It covered approximately 1.5 million leasable square feet and contained 168 stores and services beneath its newly-added roof. 
Photo from Library of Congress / Balthazar Korab Studios, Limited