Intertek ASG - http://www.intertek.com/about/

 

Iron-Age (Nidderdale) Community Archaeology Group (2004 to 2016) - http://iron-age.org

 

Iron-Age (Nidderdale) Community Archaeology Group (2015 onward) - https://ironagenidderdale.wordpress.com/

 

Historical Metallurgy Society - http://hist-met.org/

 

Nidderdale Area of Outstanding Natural Beauty - http://www.nidderdaleaonb.org.uk/

 

The Northern Mine Research Society - http://www.nmrs.org.uk/

 

Prehistory in Nidderdale - http://prehistoric-nidderdale.org/

 

Washburn Valley Website - http://www.washburnvalley.org