Burnett, Maurice G.Hexagon (KH-9) Mapping Camera Program and Evolution. — United States of America : Center for the Study of National Reconnaissance, 2012. — «The program, code name GENETRIX, called for light-weight plastic balloons carrying optical cameras and electronic equipment to be floated across the U.S.S.R. ... capable of remaining above 60,000 feet ... The cover story ... stated that the project was part of a worldwide meteorological survey. 512 vehicles were launched.». — ISBN 978-1-937219-08-6.Архивная копия от 20 марта 2023 на Wayback Machine
Schwarz, JonU.S. Sent "Weather" Balloons to Spy on China and the Soviet Union in the 1950s (неопр.). The Intercept (7 февраля 2023). — «Asked if the United States feels that they have the right to send these balloons at a certain height anywhere around the globe, Dulles answered, Yes, I think that we feel that way.» Дата обращения: 20 марта 2023. Архивировано 16 марта 2023 года.
Burnett, Maurice G.Hexagon (KH-9) Mapping Camera Program and Evolution. — United States of America : Center for the Study of National Reconnaissance, 2012. — «The program, code name GENETRIX, called for light-weight plastic balloons carrying optical cameras and electronic equipment to be floated across the U.S.S.R. ... capable of remaining above 60,000 feet ... The cover story ... stated that the project was part of a worldwide meteorological survey. 512 vehicles were launched.». — ISBN 978-1-937219-08-6.Архивная копия от 20 марта 2023 на Wayback Machine
Schwarz, JonU.S. Sent "Weather" Balloons to Spy on China and the Soviet Union in the 1950s (неопр.). The Intercept (7 февраля 2023). — «Asked if the United States feels that they have the right to send these balloons at a certain height anywhere around the globe, Dulles answered, Yes, I think that we feel that way.» Дата обращения: 20 марта 2023. Архивировано 16 марта 2023 года.
