Hern, Mary Ellen W. «Picnicking in the Northeastern United States, 1840–1900». Winterthur Portfolio, 24, 2/3, 1989, pàg. 139–152. DOI: 10.1086/496417. JSTOR: 1181262.
jstor.org
Hern, Mary Ellen W. «Picnicking in the Northeastern United States, 1840–1900». Winterthur Portfolio, 24, 2/3, 1989, pàg. 139–152. DOI: 10.1086/496417. JSTOR: 1181262.