Robuta

https://www.bgs.ac.uk/areas/water/

https://www.data.gov.uk/dataset/68a1119c-ba09-4290-a79f-64dc0576d574/british-geological-survey-bgs-geophysical-and-sampling-survey-1972-wh-2-sea-of-hebrides-05-1972

https://books.google.rs/books?id=XgBnygAACAAJ

https://www.data.gov.uk/dataset/b558b8d3-89e7-4bf8-b3d6-65bf878264be/british-geological-survey-bgs-geophysical-survey-1985-6-peach-26-may-1985-to-29-jun-1985