PETTY, R. ,. U.S. Postal Service Brings Energy Efficiency, Solar Power to Northern California Processing Facility. Distributed Generation & Alternative Energy Journal, [S. l.], v. 20, n. 2, p. 78–79, 2005. DOI: 10.13052/dgaej2156-3306.2026. Disponível em: https://journals.riverpublishers.com/index.php/DGAEJ/article/view/14375. Acesso em: 14 may. 2026.