| Items that get stuffed and stamped (Abbr) |
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| Party invites are stuffed into 'em |
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| USPS stack |
The Washington Post |
09 Jun 2019 |
| USPS stack |
LA Times Daily |
09 Jun 2019 |
| USPS stack |
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| P.O. boxful |
LA Times Daily |
04 Aug 2016 |
| Ltr. holders |
The Washington Post |
23 Jun 2016 |
| P.O. boxful |
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| Holders of ltrs. or bills |
LA Times Daily |
20 Jul 2015 |
| Holders of ltrs. or bills |
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| They may be self-sealing: Abbr. |
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| Mailers: Abbr. |
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| Letter carriers: Abbr. |
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| They may be self-sealing: Abbr. |
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| Ltr. holders |
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| Ltr. holders |
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| Ltr. carriers |
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| Letter carriers (abbr.) |
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| They're often sent by the USPS |
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| Ltr. carriers |
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| Ltr. holders |
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| Ltr. carriers |
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| Where to find the theme entries of this puzzle, briefly |
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| Stationery store stock: Abbr. |
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| Ltr. carriers |
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| Ltr. carriers |
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| GPO purchases |
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| Stationery store stock (Abbr.) |
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| Pt. of SASEs |
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| Ltr. holders |
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| Places where SWAK may be written |
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| Stationery store stock (abbr.) |
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| Ltr. holders |
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| Letter reqmts. |
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| Stationer's mdse. |
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| Office supplies: Abbr. |
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