a reference mark or number indicating the class or subject of a book in a library and often its position on the library shelves; cf. shelf-mark n. at…
单词 | θ196668 |
释义 | society > communication > book > library or collection of books > library, place, or institution > [noun] > press- or shelf-mark > indicating class or subject of book (2) class mark1824 a reference mark or number indicating the class or subject of a book in a library and often its position on the library shelves; cf. shelf-mark n. at… class number1873 = class mark n. |
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