Lee ebe a n'okpuru ma zaa ajụjụ ahụ n'otu asụsụ ahụ dị ka ebe a: Ebe a: The Library of Congress Control Number (LCCN) bụ usoro usoro nke na-edepụta ihe ndekọ na Library of Congress na United States. O nweghị ihe jikọrọ ya na ọdịnaya nke akwụkwọ ọ bụla, na ekwesịghị inwe mgbagwoju anya na Library of Congress Classification. Ajụjụ: Gịnị ka LCCN na-anọchite anya ya?
Nọmba Nchịkwa Ọbá Akwụkwọ nke Congress