Noun
- plural form of ballon d'essai
ballons-d-essai
English Wiktionary. Available under CC-BY-SA license.
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"ballons-d-essai." YourDictionary, n.d. Web. 15 January 2019. <https://www.yourdictionary.com/ballons-d-essai>.
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ballons-d-essai. (n.d.). Retrieved January 15th, 2019, from https://www.yourdictionary.com/ballons-d-essai
