The easiest way to look for a record is by ISBN. You can also look by title and author, but this will yield many more results without the ISBN. You can narrow your selections by choosing Format, Year, Language, etc.
Even though searching by ISBN is easy, it is not always best. Derived searches often help you find the right record more accurately.
A derived search uses a specific number of initial characters from words in a name and/or title. The "derived" segments of the words are separated by commas. The number and pattern of letters and commas tells the system which WorldCat index to search.
Derived searches go in the command line.
The four derived search formats include the following required number of initial letters and commas:
You can combine these formatted searches with other specifics about the item.
Ex. nd:hock,quan and yr:2018 and mt:bks
It is best if you can construct a search that yields less than 10 results.
You should be able to quickly disregard electronic records and non-English records (unless the item you have is another language).
Usually, the best record to open is the one with the most holdings. In the case above, the third record has 22 holdings. The first record is in German, so I can skip opening that one.
For the 3rd record in the example above, the title, author, publisher, pages, (basically everything that is visible) matches, Also, I see DLC in the record and that is the type of record that is best for our purposes. It means that the record was cataloged by someone at the Library of Congress. We can be pretty confident that the record is good.
Double click on the best record from the results to view.
Finding the correct record for audio-visual materials can be trickier than it is for books. Sometimes, an item will have an ISBN or you can search the UPC code on the back of the item. You can also look by title, year and select DVD video (dvv) in the Material Format dropdown window.
It is best if you can construct a search that yields less than 10 results.
You should be able to quickly disregard incorrect publishers and non-English records (unless the item you have is another language).
Usually, the best record to open is the one with the most holdings. However, this is not always the correct choice for the item.
Double click on the best record from the results to view.
After examination:
Record #7 has two discs. My item only has one.
Record #8 has optional French subtitles. My item only has English subtitles.
In this particular case, the best match was the 3rd record.
Verify these fields match the information from the item* you have in hand:
040 ǂb Language
020 ISBN
100 Author
245 Title
250 Edition Statement
260 or 264 Publication, distribution, copyright, etc.
300 Physical Description
Check to be sure these additional characteristics** match:
* fields may not be present in every record.
** additional characteristics are often not consistently cataloged in the same MARC fields.