from https://plato.stanford.edu/info.html https://plato.stanford.edu/info.html: "crawl each entry for indexing (subject to reasonable network usage constraints)

from https://plato.stanford.edu/info.html https://plato.stanford.edu/info.html: "crawl each entry for indexing (subject to reasonable network usage constraints), and distribute each entry only as permitted below provided that the purpose of the distribution is non-commercial."