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Hertfordshire Natural History Society - http://www.hnhs.org/
Describes this organisation and its specialist groups. Includes publication contents lists, programme and information about membership.
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Countryside Management Service - http://enquire.hertscc.gov.uk/cms/
Works with communities in Hertfordshire to help them to care for and enjoy the environment. Background information, details of events, opportunities for volunteering, and newsletters.
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South West Herts Astronomical Society - http://swhas.org.uk/
Meetings, events, special course, images, and observation log books.
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East Herts Geology Club - http://www.ehgc.org.uk/
Profile, meetings, local geology and merchandise.
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Hertfordshire Geological Society - http://www.hertsgeolsoc.ology.org.uk/
Profile, meetings, field trips and archives.
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Friends of Northaw Great Wood - http://homepage.ntlworld.com/peter.walker6/northaw/
A group of volunteers assist with nature conservation in Northaw Great Wood.
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