citation-style-language/styles — pull request #1045 by serpodrick (2014-08-01 19:22:07+00:00)
Title: Abbreviation for pages should never be plural for Council for Science Editors

According to the 8th edition of CSE (29.3.6.9), "pages" should be abbreviated as "p.", not "pp.". council-of-science-editors-author-date.csl already does this.