Hruby, Denise. <br/><br/>
Alpine ice caves :  when the magic melts / 
Denise Hruby, and Robbie Shone. 
 - Washington ;  National Geographic Partners, LLC.,   October 2022. 
 - volume 241, pages 92-111,   illustration. 
<br/><br/> National Geographic, v. 242, n. 4, pages 92-111, September 2022.