national gravity reference net, 1973 (NGRN 73)
By: ordnance survey in conjunction with the Institute of Geological Sciences; [prepared] by D. Masson Smith, P.M. Howell, A.B.D.E. Abernethy-Clark; D.W. Proctor, editor.
Contributors: Smith, D. Masson.; Proctor, Donald William.; Institute of Geological sciences.
Series: Professional papers: new series -- 26.
Publisher: ordnance Survey of Great Britain; The Institute
Published: 1974
Place of publication: Southampton; [London]
Language: eng