 Harper's photographs are in the permanent collections of major institutions such as the Museum of Modern Art, New York, the Whitney Museum of American Art, New York, the Albright-Knox Art Gallery in Buffalo, New York, the Museum of Fine Arts, Houston, Texas, the Santa Barbara Museum of Art, Santa Barbara, California, the Nelson-Atkins Museum in Kansas City, Missouri, the Harvard Art Museums, Cambridge, Massachusetts, the Portland Art Museum, Portland Oregon, and the New York Public Library.