Susteršič, F. 2014. Douglas W. Kirkland: Role of Hydrogen Sulfide in the Formation of Cave and Karst Phenomena in the Guadalupe Mountains and Western Delaware Basin, New Mexico and Texas. Acta Carsologica. 43, 2-3 (Dec. 2014). DOI:https://doi.org/10.3986/ac.v43i2-3.1658.