3 ms·
ISBNs were only introduced in the 70s, and I have quite a lot of second hand books that predate its introduction. Even if a book does have an ISBN there are a s
by aardvark179 5y ago
ISBNs were only introduced in the 70s, and I have quite a lot of second hand books that predate its introduction. Even if a book does have an ISBN there are a significant number from before bar codes became ubiquitous so are slightly more annoying to scan.