Keyes, Christopher R, and Rubén Manso González. “Climate-Influenced Ponderosa Pine (Pinus Ponderosa) Seed Masting Trends in Western Montana, USA”. Forest Systems 24, no. 1 (June 12, 2015): e021. Accessed April 29, 2024. https://fs.revistas.csic.es/index.php/fs/article/view/5606.