(NG, 5/88, p.629,635) 160,000 An ice-core drilled by Russian scientists at Vostok Station in East Antarctica was analyzed by a group of scientists in Grenoble, Switzerland and is bound to go back to an ice-age of this period.
(An ice-core; drilled; by Russian scientists at Vostok Station in East Antarctica) (An ice-core drilled by Russian scientists at Vostok Station in East Antarctica; was analyzed; by a group of scientists in Grenoble, Switzerland)
An ice-core An ice-core drilled by Russian scientists at Vostok Station in East Antarctica
drilled was analyzed
by Russian scientists at Vostok Station in East Antarctica
by a group of scientists in Grenoble, Switzerland