Walter Sullivan "Soviet Union Undertaking Vast Program of Subterranean Study using holes bored nine miles deep" - 30 Nov. 1962 "Island Chains Formed by Single Volcano" - 29 Apr. 1963 "New Ocean Echo Device Finds Earth’s Apparent Original Crust" - 12 May 1963 The New York Times
"Soviet Union Undertaking Vast Program of Subterranean Study using holes bored nine miles deep" - 30 Nov. 1962
