If you are in the eLibrary opening page, you can access the Advanced Search page by clicking on the Advanced Search link near the middle of the page.
If you are in the one of the other search pages, click on the Advanced Search link on the menu in the blue column on the left side of the page.
If you are in a search results page, click on the AdvSearch link in the blue menu bar near the top of the page.
Related topics
Advanced Search Page Elements
Advanced Search Overview
Advanced Search Steps
Search Results Overview