| "In reference," in an email: Abbr. |
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| "This is regarding ..." in textspeak: Abbr. |
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| With reference to (SMS) (1,1,1) |
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| With respect to |
The Telegraph Cross Atlantic |
20 Dec 2024 |
| "Concerning" in business emails: Abbr. |
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| "In reference," in an email: Abbr. |
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| "This is regarding": Abbr. |
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| Concerning, in an email: Abbr. |
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| "This is regarding," in textspeak: Abbr. |
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| "In reference": Abbr. |
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| "This is regarding": Abbr. |
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| Concerning, in textspeak: Abbr. |
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| Concerning: Abbr. |
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| Concerning: Abbr. |
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