www.caves.org The Southeastern Regional Association (SERA) is a regional organization made up of all the NSS organizations caving grotto's,clubs and surveys in the Southeastern portion of the United States of America. www.speleo.nl Speleo Nederland,Association Néerlandaise de Spéléologie, Caving club of the Netherlands,English summary available, Caving Expeditions to Berger, Laos, Irian Jaya,Philippines,Vereniging van speleologen,grotonderzoekers, met informatie over de vereniging,uittreksels uit het verenigingsblad de Pierk, Uitgebreide informatie over het onstaan van grotten, inclusief foto's en tekeningen www.thedca.org.uk Formed in 1960 to foster co-operation between cavers and to promote good relations between cavers, landowners, farmers, and the general public. |