Preston, Alan M., Heidi Venegas, Cindy A. Rodríguez, and Rose M. Vélez-Rodríguez. “Assessment of the National School Lunch Program in a Subset of Schools in San Juan, Puerto Rico: Participants Vs. Non-Participants”. Puerto Rico Health Sciences Journal 32, no. 1 (March 12, 2013). Accessed November 28, 2025. https://prhsj.rcm.upr.edu/index.php/prhsj/article/view/765.