The most recent issues of journals may not even appear in a JSTOR search, however, if they are behind the database's 1-5 year "moving wall."
Google Scholar incorporates more types of information -- not just books and journal contents-- and depending on your need, comfort level, and perspective, that eclecticism can be an advantage.
GS is perfectly acceptable for most general forays into scholarship; its algorithms are excellent and do return relevant results. GS can also be a good way to follow citation trails.
Image, above: the first issue of the NAACP's flagship publication, The Crisis, conceived and edited by WEB Du Bois. Read more about its history at the Modernist Journal Project.
Includes NAACP Papers; records of SNCC and CORE ; federal government records (FBI files, e.g.), and personal papers of individuals important to the movement.
Includes the contents of major U.S. dailies, like the New York Times, Washington Post, LosAngeles Times, Baltimore Sun, Boston Globe, Chicago Tribune, Philadelphia Inquirer, St. Louis Post and Dispatch, and the Wall Street Journal.
In addition, your search will pick up content from 10 important African American news titles: Atlanta Daily World; Baltimore Afro-American; Chicago Defender; Cleveland Call and Post; Los Angeles Sentinel; Michigan Chronicle; New York Amsterdam News; Norfolk Journal and Guide; Philadelphia Tribune; and Pittsburgh Courier.
A database that allows you to broadly search the contents of state, local, and regional newspapers from 1607 through the 20th century.
Smaller news outlets sometimes give a different perspective than major dailies and sometimes a fuller treatment of issues "close to home."
A database of close to 15,000 newspapers, mainly from the U.S., many on the local level. The database is offered in partnership with Ancestry.com.
One simple change can turn Google Scholar into what's effectively a Harvard database -- with links to the full-text of articles that the library can provide. Here's what to do: Look to the left of the GS screen and click on the "hamburger" (); then click on . Look for "Library Links." Then type Harvard University into the search box and save your choice. As long as you allow cookies, the settings will keep.
Zotero, a free, open source citation management tool will take the process of collecting and organizing citations, incorporating them into your paper, and creating a bibliography or works cited page to the next level.
It's worth the small investment of time to learn Zotero. A good guide, produced by Harvard librarians, is available here: http://guides.library.harvard.edu/zotero.