Load Marygrove MARC records into Open Library

[hornc]

This collection of books from Marygrove College will soon be scanned and in order to enable metadata lookup for that process, and eventually have those books borrowable on OL, we need to create the corresponding data records in advance.

Task List:

• Upload data to new item under https://archive.org/details/ol_data collection
• create Marygrove /type/local_id https://openlibrary.org/local_ids
• Import records

[hornc]

MARC binary data in https://archive.org/details/marc_marygrove

[hornc]

local_id details: https://openlibrary.org/local_ids/mgc

[hornc]

Have confirmed that Marygrove MARC records are MARC-8 encoded, (yaz-marcdump originally fake-converted the results which made me think they were UTF-8 ) This relates to #713 which I want to add test cases for. This import is blocked until I can confirm we properly handle MARC-8 encoded records.

[hornc]

First test edit:
https://openlibrary.org/books/OL5910281M/Collected_works.?_compare=Compare&b=4&a=3&m=diff

from MARC record at marc_marygrove/metacoll.ERR.new.D20191108.T213022.internetarchive2nd.1.mrc:0:1883

Didn't write local_id... because the source MARC did not have a 876 field.

[hornc]

I had to regenerate the entire MARC collection to enable this by including a custom 976 field in the bibliographic MARC records, and converted to utf8 in the process.

I had to modify the local_id record and the source data
marygrovecollegelibrary.full.D20191108.T213022.internetarchive2nd_REPACK.mrc

Now all ~70k records' local_ids have been imported.

Example lookup by local_id: https://openlibrary.org/api/books.json?bibkeys=local_id:urn:mgc:31927000333986