Advertisement
Browse Subject Areas
?

Click through the PLOS taxonomy to find articles in your field.

For more information about PLOS Subject Areas, click here.

< Back to Article

The Number of Scholarly Documents on the Public Web

Figure 2

Relative number of documents by scholarly search engines and databases.

Total and Google Scholar are estimates.

Figure 2

doi: https://doi.org/10.1371/journal.pone.0093949.g002