* Weymouth & Portland borough council* Geology of the Wessex Coast of Southern England* Exploring Portland* Portland's very own 'Royal Manor Theatre'* Portland Sculpture & Quarry Trust* Isle of Portland Industrial Archaeological Survey from English Heritage
* Weymouth & Portland borough council* Geology of the Wessex Coast of Southern England* Exploring Portland* Portland’s very own 'Royal Manor Theatre'* Portland Sculpture & Quarry Trust* Isle of Portland Industrial Archaeological Survey from English Heritage