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According to Ulrich’s Periodical Directory, there are 1,498 academic peer reviewed journals still being published which were active in or before 1921. This compares to a total number of 79,218 academic peer reviewed journals. So only 1.89% of all journals are 100 years old or more. From the 100+ year old journals, 92 are (now) Open Access.
During the past 100 years of Poultry Science, the journal has published 844 issues, 28,165 articles and 186,735 pages.
*An early version of the Poultry Science Association; not a separate entity