Hsu, Chin-Fei, and Stanley A. Changnon. “Using Historical Data to Evaluate Two Large-Area Operational Seeding Projects”. The Journal of Weather Modification 16, no. 1 (April 1, 1984): 40–45. Accessed September 22, 2023. https://journalofweathermodification.org/index.php/JWM/article/view/115.