A few of the 132 million objects held at the Library of Congress. Credit...Illustration by The New York Times; photograph by Doug Mills/The New York Times SALINAS, Calif. THE National Steinbeck Center, at the top of Main Street in this farming community, exhibits an array of artifacts from John Steinbeck's life and works: family memorabilia, a passport from the 1960s and movie stills from "The Gr