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The Nature letter of February 1968


tex2html_wrap_inline3922   source lies outside the solar system
tex2html_wrap_inline3922   distance is typical of stellar distances
tex2html_wrap_inline3922   source must be very small
tex2html_wrap_inline3922   possibly a white dwarf or neutron star
tex2html_wrap_inline3922   astrophysical origin, not ET civilisation

Jon Bell
Thu Dec 19 15:15:11 GMT 1996