Addition, Elimination and Substitution: Markovnikov, Hofmann, Zaitsev and Walden David E. Lewis E-Book (epub)

Nonsuicidal Self-Injury E. David Klonsky, Jennifer Muehlenkamp, Stephen P. Lewis E-Book (pdf)

Mushrooms of the Gulf Coast States Bessette Alan E. Bessette, Bessette Arleen R. Bessette, Lewis David P. Lewis E-Book (epub)