Ebook: Signals and Systems Using MATLAB, Third Edition [3rd Ed] (Instructor's Edu Resource 1 of 2, Figures, Solution Manual, Lecture Content) (Solutions)

official resources containing figures (as PDF), solution manual, and lectures (as PDF). PPT versions of lectures & figures are much the same but with lower quality (for example, the PDF version has pages not in PPT ones, the formulas of the PPT are rasterized into bitmaps but the PDF version has zoom-able vector formulas)