| 32 |
British National Bibliography |
Books... |
|
| 33 |
Crossref Metadata Search |
Books & Articles Metadata... |
|
| 34 |
Google Books |
Books... |
|
| 35 |
LibGen |
Library Genesis search engine... |
|
| 36 |
New York Times Books |
Book reviews and The New York Times Best Sellers lists... |
|
| 37 |
Open Library |
Books, book covers and related data... |
|
