I guess you can not get access to on-line version because there is none.
It is hard to believe, but national cave catalog exists only on paper. I know. I'm one that wants to change this. This is part of the reason I'm here. I want to learn and find out if anyone would be interested in cooperating in new on-line system I'm building. I will need help here.
For them not to answer direct mail .... Maybe don't even know how rude that is.
Bears and wolves? Slovenia has cca 600 brown bears, 50 wolves and few lynx. Most of them living in S and SE of country. Just around my home. So if you really want adrenaline caving, just go in caves in winter. If you wake on of them, you will not be first one to do so ...
Now I'll need days to study these links. This is great