We've got the 1882 Chinese Exclusion Act's text here, plus an entire learning guide dedicated to it.

Emma Lazarus' poem, "The New Colossus," as inscribed upon the pedestal of the Statue of Liberty.

Thomas Bailey Aldrich's poem, "Unguarded Gates," is an anti-immigrant counter to Emma Lazarus' "The New Colussus," published in 1895.

This page includes historical statistics on the foreign-born population of the United States.

Here's testimony from the trial of Sacco and Vanzetti.