A study of the readiness of post-pandemic computer-based four-tier diagnostic test (CBFTDT): A review of economic level, school grades, and device accessibility oleh Edi Istiyono, Wipsar Sunu Brams Dwandaru, Made Rai Shanti Ayub, Duden Saepuzaman, Rizki Zakwandi, Anisyah Rachman, Eri Yusron, Purwoko Haryadi Santoso