"लाइब्रेरी ऑफ कॉंग्रेस नियंत्रण संख्या" के अवतरणों में अंतर

 

Serial numbers are six digits long and should include leading zeros. The [[hyphen]] that is often seen separating the year and serial number is optional. More recently, the Library of Congress has instructed publishers not to include a hyphen.

 

==See also==