Source: https://www.cambridge.org/core/services/aop-cambridge-core/content/view/EC53547DEEAE154C93E0FE99F2C7E4B8/S0022143000204000a.pdf/div-class-title-inventory-and-recent-changes-of-small-glaciers-on-the-northeast-margin-of-the-southern-patagonia-icefield-argentina-div.pdf