Subject
2 free books about poison ivy, free to read online. Chapter 1 of any book is free, no account needed.
Some Constituents of the Poison Ivy Plant (Rhus Toxicodendron)
William Anderson Syme
Poison-ivy, poison-oak and poison sumac: Identification, precautions, eradication
Crooks, D. M. (Donald Mundell); Kephart, L. W.
