Although it's not a Harvard Library "database," Google Scholar is perfectly acceptable for most general forays into scholarship; its algorithms are excellent and do return relevant results.
One of the best ways to generate research leads with Scholar is to use it to follow citation trails when you have a known source -- a class reading, a book you've found on HOLLIS that looks promising, an article that's so "perfect" for a research project that you want to see if there's "more like it" out there, waiting to be discovered.
For example:
PRO-TIP
One simple change to the settings in Google Scholar will turn it into what's effectively a Harvard database -- with links to the full-text of journal articles that GS wants you to pay for. We give them to you free of charge.
Here's how to optimize Google Scholar for Harvard access:
Look to the left of the GS screen and click on the "hamburger" (); then click on . Look for "Library Links." Then type Harvard into the search box and save your choice. As long as you allow cookies, the settings will keep.