Create journal database: is there any easy way to auto download all the citations of a volume or all the volumes of a journal? I am trying to create my own research database, the first step I do is to identify the journals that I need to read and refer to. The way I create the searching database is copying all the articles titles and authors one by one, or downloading the endnote citation format and input it into the endnote database. I found this process very time-consuming and wonder if there are ways to download all the citations of a volume/journal at one time or a few times? 

Thank you!
Most journals deposit metadata at CrossRef, and CrossRef offers an API for accessing these data.

To access journal-level data, you need the journal's ISSN. You can find it on the journal's  website.

For instance, to access the metadata of the journal International Organization (ISSN 1531-5088), you can look at: 
https://api.crossref.org/journals/1531-5088 (You should use a JSON-Beautifier to format the text).

Look at CrossRef's API Documentation to find out how to fetch the journal-level data you wish to get. 

Just as an example, if you modify the URL to this one: https://api.crossref.org/journals/1531-5088/works?sort=issued&amp;order=desc&amp;filter=from-online-pub-date:2020-01&amp;select=author,DOI,title,references-count - - then you will see all articles from the journal International Organization issued since January 2020, and for each article you will only see those metadata that you selected in the URL, i.e. the author name, the DOI, the title of the paper, and the number of references the paper contains.

Good luck.