@article{180446, note = {Replies from Belgium.}, url = {http://digitallibrary.un.org/record/180446}, title = {Questionnaire on non-seismic techniques : working paper /}, publisher = {UN,}, recid = {180446}, pages = {5 p.}, address = {Geneva :. 1994-06-24}, year = {1994}, month = {Jun}, }