ESLAB Symposium on the Exploration of Halley's Comet & European Space Agency. (1986). 20th ESLAB Symposium on the Exploration of Halley's Comet: Proceedings of the international symposium, Heidelberg, Germany, 27-31 October 1986. European Space Agency.
Cita Chicago Style (17a ed.)ESLAB Symposium on the Exploration of Halley's Comet y European Space Agency. 20th ESLAB Symposium on the Exploration of Halley's Comet: Proceedings of the International Symposium, Heidelberg, Germany, 27-31 October 1986. Paris, France: European Space Agency, 1986.
Cita MLA (9a ed.)ESLAB Symposium on the Exploration of Halley's Comet y European Space Agency. 20th ESLAB Symposium on the Exploration of Halley's Comet: Proceedings of the International Symposium, Heidelberg, Germany, 27-31 October 1986. European Space Agency, 1986.
