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"MMBTU." Fullformexpand.com, https://www.fullformexpand.com/mmbtu/665071. Accessed 27 Nov. 2025.
Fullformexpand.com, 2025. "MMBTU." Accessed November 27, 2025. https://www.fullformexpand.com/mmbtu/665071.
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MMBTU. (2025). Fullformexpand.com. Available at: https://www.fullformexpand.com/mmbtu/665071 (Accessed: 27 November 2025).