lesser-known secrets of GOOGLE

First, open Google, and in the keyword input box, type "indexof/" inurl:lib (the quotation marks should be in English mode), then select the "Search Simplified Chinese web pages" option, press Enter to search. You will get some web pages. Don't assume these are ordinary pages; in fact, they are resource lists from some book websites. Click and open them to take a look. Can you see all the resources at a glance?

Using other keywords may yield more resources:

In the search bar, input: "index of /" cnki.