@book
{TN_libero_mab2,
author = {
Beard, Charles Austin
AND
Beard, Mary Ritter
Beard, William
},
title = {
The Beards'
new basic history of the United States
},
publisher = {Doubleday},
year = {1968},
address = {
Garden City, N.Y.
},
url = {
http://slubdd.de/katalog?TN_libero_mab2
}
}