All Complex Ecosystems Have Parasites
Cory Doctorow
Foundation of Physics for Scientists and Engineers
Ali R. Fa
US history
PS Corbett & V Janssen & JM Lund & TJ Pfannestiel
Mathematics - Free of Worries at the University II
Christian Posthoff; Brand Steinbach
Elementary Algebra
Lynn Marecek & OpenStax & MaryAnne Anthony-Smith
Precalculus
Jay P. Abramson & Valeree Falduto & Rachael Gross (Mathematics teacher) & David Lippman & Melonie Rasmussen & Rick Norwood & Nicholas Belloit & Jean-Marie Magnier & Harold Whipple & Christina Fernandez
Algebra and Trigonometry
Jay P. Abramson & Valeree Falduto & Rachael Gross (Mathematics teacher) & David Lippman & Rick Norwood & Melonie Rasmussen & Nicholas Belloit & Jean-Marie Magnier & Harold Whipple & Christina Fernandez