@article{186714, url = {http://digitallibrary.un.org/record/186714}, title = {Non-seismic detection techniques : survey of the state of the art and problems of synergy : working paper /}, publisher = {UN,}, recid = {186714}, pages = {11 p. :}, address = {Geneva :. 1993-06-25}, year = {1993}, month = {Jun}, }