order soruces and cleanup formatting and labeling

Author: TimidRobot

sources.md

@@ -4,6 +4,25 @@ This project uses data from various sources that are openly licensed or in the
 public domain. Below are the sources and their respective information:
 
 
+## arXiv
+
+**Description:** arXiv is a free distribution service and an open-access archive for scholarly articles in physics, mathematics, computer science, quantitative biology, quantitative finance, statistics, electrical engineering and systems science, and economics. All arXiv articles are available under various open licenses or are in the public domain.
+
+**API documentation link:**
+- [arXiv API User Manual](https://arxiv.org/help/api/user-manual)
+- [arXiv API Reference](https://arxiv.org/help/api)
+- [Base URL](http://export.arxiv.org/api/query)
+- [arXiv Subject Classifications](https://arxiv.org/category_taxonomy)
+- [Terms of Use for arXiv APIs](https://info.arxiv.org/help/api/tou.html)
+
+**API information:**
+- No API key required
+- Query limit: No official limit, but requests should be made responsibly
+- Data available through Atom XML format
+- Supports search by fields: title (ti), author (au), abstract (abs), comment (co), journal reference (jr), subject category (cat), report number (rn), id, all (searches all fields), and submittedDate (date filter)
+- Metadata includes licensing information for each paper
+
+
 ## CC Legal Tools
 
 **Description:** A `.txt` file provided by Timid Robot containing all legal
@@ -23,7 +42,7 @@ tool paths.
 [prioritized-tool-urls]: data/prioritized-tool-urls.txt
 
 
-## EUROPEANA DATA API
+## Europeana
 
 **Description:**
 The **Europeana Search API** provides access to digital cultural heritage metadata records aggregated from museums, libraries, and archives across Europe. This project uses the API to fetch aggregated counts of cultural heritage records by data provider, rights statement, and theme.
@@ -101,6 +120,7 @@ and access towards related query data using a programmable search engine.
   5000 requests per hour if authenticated
 - Data available through JSON format
 
+
 ## Wikipedia
 
 **Description:** The Wikipedia API allows users to query statistics of pages,
@@ -122,22 +142,3 @@ language edition of wikipedia. It runs on the Meta-Wiki API.
 - No API key required
 - Query limit: It is rate-limited only to prevent abuse
 - Data available through XML or JSON format
-
-
-## arXiv
-
-**Description:** arXiv is a free distribution service and an open-access archive for scholarly articles in physics, mathematics, computer science, quantitative biology, quantitative finance, statistics, electrical engineering and systems science, and economics. All arXiv articles are available under various open licenses or are in the public domain.
-
-**API documentation link:**
-- [arXiv API User Manual](https://arxiv.org/help/api/user-manual)
-- [arXiv API Reference](https://arxiv.org/help/api)
-- [Base URL](http://export.arxiv.org/api/query)
-- [arXiv Subject Classifications](https://arxiv.org/category_taxonomy)
-- [Terms of Use for arXiv APIs](https://info.arxiv.org/help/api/tou.html)
-
-**API information:**
-- No API key required
-- Query limit: No official limit, but requests should be made responsibly
-- Data available through Atom XML format
-- Supports search by fields: title (ti), author (au), abstract (abs), comment (co), journal reference (jr), subject category (cat), report number (rn), id, all (searches all fields), and submittedDate (date filter)
-- Metadata includes licensing information for each paper