Kluger, Jeffrey (2017). Apollo 8: The Thrilling Story of the First Mission to the Moon. New York: Henry Holt. ISBN 978-1-62779-832-7. OCLC 1055851709.

The Gen. Thomas D. White USAF Space Trophy" (PDF). Air Force Magazine. May 1997. p.156. Archived (PDF) from the original on April 12, 2019 . Retrieved February 15, 2019. Blaser, Linda (February 19, 2014). "Lovell family confirms sale of Lake Forest restaurant". Lake Forester. Lake Forest, Illinois. Archived from the original on February 22, 2014 . Retrieved July 30, 2015. Although a reduction in passionate love is not experienced by all couples, various studies report approximately 20-40% of couples experience this downturn. Of couples who have been married in excess of ten years, the steepest downturn is most likely to occur over the second decade. The word "love" can have a variety of related but distinct meanings in different contexts. Many other languages use multiple words to express some of the different concepts that in English are denoted as "love"; one example is the plurality of Greek concepts for "love" ( agape, eros, philia, storge). [9] Cultural differences in conceptualizing love make it difficult to establish a universal definition. [10] People can have a profound dedication and immense appreciation for an object, principle, or objective, thereby experiencing a sense of love towards it. For example, compassionate outreach and volunteer workers' "love" of their cause may sometimes be born not of interpersonal love but impersonal love, altruism, and strong spiritual or political convictions. [4] People can also "love" material objects, animals, or activities if they invest themselves in bonding or otherwise identifying with those things. If sexual passion is also involved, then this feeling is called paraphilia. [18] Interpersonal

Main article: Gemini 7 Lovell before the Gemini 7 launch in the special G5C space suit, which had a zippered hood with a visor instead of a solid helmet

Burgess, Colin (2011). Selecting the Mercury Seven: The Search for America's First Astronauts. New York: Springer. ISBN 978-1-4419-8405-0. OCLC 905280431. The Bhagavad Gita. Penguin Classics. Translated by Mascaró, Juan. Penguin. 2003. ISBN 978-0-14-044918-1.I have said before that it is not in any real love percentage, you can use it in Fun Purpose. ➢ How to work this Love Calculator? Main article: Apollo 13 Marilyn Lovell and children Susan, Barbara and Jeffrey meet with reporters after the safe return of Apollo 13 Here are the Next Nine Astronauts Who Will Join in U.S. Race to the Moon". The Tampa Tribune. Tampa, Florida. UPI. September 18, 1962. p.4A. Archived from the original on June 29, 2019 . Retrieved June 29, 2019– via Newspapers.com. Apollo 13". NASA. July 8, 2009. Archived from the original on November 17, 2017 . Retrieved December 29, 2017.