ScienceDirect - Journal of Historical Geography : British speleologies: geograph...
[http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6WJN-4JVSVP3-1&_user=745831&_coverDate=10%2F31%2F2006&_rdoc=1&_fmt=&_orig=search&_sort=d&view=c&_acct=C000041498&_version=1&_urlVersion=0&_userid=745] - - public:GustavHolmberg
