The sand and gravel resources of the country around Welwyn Garden City, Hertfordshire
Subtitle: description of 1,25000 resource sheet TL11 and TL21
By: J.R. Gozzard.
Contributors: Institute of Geological Sciences.
Series: Mineral assessment report -- 69
Publisher: H.M.S.O.
Published: 1981
Place of publication: London
Language: eng
Number of pages: 83
Subjects: Sand -- England -- Welwyn Garden City region (Hertfordshire); Gravel -- England -- Welwyn Garden City region (Hertfordshire)
Notes: At head of title, Institute of Geological Sciences.

Map (1folded sheet) in pocket.

Bibliography, p80.