Discover how to perform a number phrase search when searching WorldCat indexes.
Definition
Any number that is part of a record's bibliographic information that you can use to retrieve the records you need. The system finds the number in an indexed field.
Index label format
xx= (where x represents an alphanumeric character)
Examples
NLM Class Number — lm=hq 1381 c524w 1976
Music/Publisher Number — mn=co1979ab51
Notes
Most efficient way to search for these types of numbers:
A number search can retrieve a single record (e.g., by its unique ISBN) or precisely related records (e.g., by class number). Numbers are usually unique to a single record or group of related records.
Type all numbers and letters.
Omit spaces.
Omit punctuation, except keep periods (.) in classification numbers.
When entering ISBNs ending in x — If you use the number keypad, truncate the number using the asterisk key (*).