Starting with the source at https://github.com/APEXCalculus, faculty at the University of North Dakota made several substantial changes to create APEX Late Transcendentals. The most obvious change was to rearrange the text to delay proving the derivative of transcendental functions until Calculus 2. UND added Sections 7.1 and 7.3, adapted several sections from other resources, created the prerequisite sections, included links to videos and Geogebra, and added several examples and exercises. In the end, every section had some changes (some more substantial than others), resulting in a document that is about 10% longer. The source files can now be found at https://github.com/teepeemm/APEXCalculusLT_Source.
Extra thanks are due to Michael Corral for allowing us to use portions of his Vector Calculus, available at www.mecmath.net/ (specifically, Section 13.9 and the Jacobian in Section 14.7) and to Paul Dawkins for allowing us to use portions of his online math notes from tutorial.math.lamar.edu/ (specifically, Sections 8.5 and 9.7, as well as “Area with Parametric Equations” in Section 10.3). The work on Calculus III was partially supported by the NDUS OER Initiative.