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doi.org
Sarsby, Jacqueline (1997). "Alfred Powell: Idealism and Realism in the Cotswolds". Journal of Design History. 10 (4): 390. doi:10.1093/jdh/10.4.375. JSTOR1316209.
Sarsby, Jacqueline (1997). "Alfred Powell: Idealism and Realism in the Cotswolds". Journal of Design History. 10 (4): 390. doi:10.1093/jdh/10.4.375. JSTOR1316209.