เปรียบเทียบวิธี

	Ulrichsweb Global Serials Directory	ไดเรกทอรี่วารสารเข้าถึงแบบเปิด (Directory of Open Access Journals)
สาขาวิชา	บรรณมิติ	บรรณมิติ
ตระกูล	Process / pipeline	Process / pipeline
ปีกำเนิด	1932	2003
ผู้ริเริ่ม	Bowker (originally R.R. Bowker), now ProQuest LLC	DOAJ Community (Swedish library consortium, later expanded to international consortium)
ประเภท	Database	Database
แหล่งต้นตำรับ	ProQuest. (2024). Ulrichsweb: Global Serials Directory. Retrieved from https://ulrichsweb.serialssolutions.com/	Directory of Open Access Journals. (2024). About DOAJ. Retrieved from https://doaj.org/
ชื่อเรียกอื่น	Ulrichsweb, Ulrich's International Periodicals Directory, Ulrich's Directory	DOAJ, Directory of Open Access
ที่เกี่ยวข้อง	4	5
สรุป	Ulrichsweb is a comprehensive, subscription-based global serials directory cataloging over 300,000 print and electronic journals, magazines, newspapers, and other periodical publications. Developed by ProQuest (originally R.R. Bowker), Ulrichsweb has served librarians and researchers for over 90 years as the authoritative source for journal metadata, publication information, and peer-review verification. A unique feature is Ulrichsweb's verification program: editorial staff contact journals directly to confirm peer-review claims, marking journals as 'refereed' only after validation. This verification process distinguishes legitimate peer-reviewed journals from predatory publishers falsely claiming peer review.	The Directory of Open Access Journals (DOAJ) is a community-maintained, freely accessible directory of high-quality, peer-reviewed open-access journals and articles established in 2003. DOAJ indexes over 20,000 open-access journals across all disciplines (sciences, social sciences, humanities, arts) from diverse geographic regions. The directory serves researchers, librarians, and administrators as the authoritative curated list of legitimate open-access journals—differentiating quality open-access publications from predatory journals that lack genuine peer review. DOAJ quality seal, awarded to journals meeting stricter governance and transparency criteria, enables identification of the highest-caliber open-access publications.