She's apparently recycling her empty Stroh's beer cans into her library's book return slot. And it's her official yearbook portrait. From Queens College's 1973 yearbook.
Are books actually the same as beer? Consider: "Pouring knowledge into yourself from the books like beer into a big mug until you were saturated, brimming" (Engineering and Science magazine, 1950), and "Books, like beer, have gone up in price but down in quality" (The American Oxonian, 1968).