"Also, the Library of Congress receives a copy of all books published in the United States."
... Most of which go into the dumpster.
That said, the LOC is certainly a valuable resource, so do not hesitate to use it; oftentimes it does have what you seek.
MBA, JD, MLS
Ken Ryesky, Petach Tikva, Israel kenneth.ryesky@...
RAISKY/REISKY, ARONOV, SHKOLNIK(OV), AEROV; Gomel, Belarus
GERTZIG, BRODSKY; Yelizavetgrad, Ukraine
BRODSKY, VASILESKY; Odessa, Ukraine
IZRAELSON, ARSHENOV; Yevpatoriya, Ukraine (Crimea)