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P. M. Hopson

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The sand and gravel resources of the country around Hertford, Hertfordshire: description of 1:25 000 resource sheet TL31
The sand and gravel resources of the country west of Chelmsford, Essex: description of 1:25 000 resource sheet TL60.
The Sand and Gravel Resources of the Country Around Nayland, Suffolk Description of 1:25 000 Resource Sheet TL 93
P. M. Hopson — Books & Biography | Menrva Books