Davidson, Susan: Peggy Guggenheim and Howard Putzel: Partners in Purchasing, in Drost, Julia et al. (Hrsg.): Networking Surrealism in the USA: Agents, Artists, and the Market, Heidelberg: arthistoricum.net, 2019 (Passages online, Band 3), S. 99–118. https://doi.org/10.11588/arthistoricum.485.c7923