Helfand, W. H., Boyer, P. E., Wechsler, J., & Rickards, M. (1991). The picture of health: Images of medicine and pharmacy from the William H. Helfand Collection. Philadelphia: Philadelphia Museum of Art ; Distributed by the University of Pennsylvania Press.

Helfand, William H., Patricia Eckert Boyer, Judith Wechsler, and Maurice Rickards. The Picture of Health: Images of Medicine and Pharmacy From the William H. Helfand Collection. Philadelphia: Philadelphia Museum of Art ; Distributed by the University of Pennsylvania Press, 1991.

Helfand, William H., Patricia Eckert Boyer, Judith Wechsler, and Maurice Rickards. The Picture of Health: Images of Medicine and Pharmacy From the William H. Helfand Collection. Philadelphia: Philadelphia Museum of Art ; Distributed by the University of Pennsylvania Press, 1991.