Reference:

Formstone, B., & Howe, M., 2013. Brownfield sites and their value for invertebrates–A survey of selected sand quarries in north-east Wales in 2013: Borras Quarry and Marford Quarry. Cyfoeth Naturiol Cymru Natural Resources Wales, NRW Evidence Report No. 21

URL:

https://cdn.naturalresources.wales/media/684863/report-021-value-of-brownfield-sites-for-invertebrates-marford-borras-quarries.pdf

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