Here, we see the West Wing of the complex, which housed tenants such as an F.W. Woolworth 5 & dime and Grand Union grocery.
Photo from Library Of Congress

In this high-definition image, we see West Wing stores, John Wanamaker and a North Wing, which extends into the background. At its far end is a Pennsylvania Drugs store. A suite of leased office space occupies an upper level.
Photo from Library of Congress / https://www.shorpy.com / Shorpy, The American Historical Photo Archive 

A physical layout of the original strip complex. In its original state, it covered approximately 216,500 leasable square feet. 

In a SHOPPING MART aerial view from the early 1950s, Pennsylvania Drugs occupies the ground floor of the 2-story structure on the far left. John Wanamaker Great Neck operates in the large structure at the center of the center. One of -if not- the first shopping center Grand Union grocery stores is seen on the far right.

Photo from the Grand Union Company Annual Report 1951