Grand Tour program (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Grand Tour program" in English language version.

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books.google.com

Butrica, Andrew J. (1998). "Voyager: The Grand Tour of Big Science". In Mack, Pamela E. (ed.). From Engineering Science to Big Science: The NACA and NASA Collier Trophy Research Project Winners. Washington, D.C.: NASA. ISBN 978-1-4102-2531-3. Archived from the original on 2014-08-23. Retrieved 2014-08-25.

"'Grand Tour' Space Flight Plan Reined". Sarasota Journal. UPI. 1 March 1972. Retrieved 29 August 2020.

Harold M. Schmeck Jr. (August 4, 1969). "23 Scientists Ask Unmanned Probe of Outer Planets". The New York Times.
James M. Naughton (March 8, 1970). "Nixon asks start of a 'grand tour' of planets in '77". The New York Times. The sending of the unmanned "grand tour" craft on cruises to the outer planets — Jupiter, Saturn, Uranus, Neptune and Pluto — in 1977 and 1979. Such probes, which could take a decade or longer to complete, have long been proposed by scientists because the alignment of the planets will not favor such an effort again for about 180 years after this decade. Mr. Nixon's announcement was the first giving White House support to the attempt.

Butrica, Andrew J. (1998). "Voyager: The Grand Tour of Big Science". In Mack, Pamela E. (ed.). From Engineering Science to Big Science: The NACA and NASA Collier Trophy Research Project Winners. Washington, D.C.: NASA. ISBN 978-1-4102-2531-3. Archived from the original on 2014-08-23. Retrieved 2014-08-25.