Pharmaceutical Botany; a Text-Book for Students of Pharmacy and ScienceHeber W. (Heber Wilkinson) Youngken · First published 2021Open the Tome
Natural Drugs - Morphologic and Taxonomic ConsiderationsHeber Wilkinson Youngken · First published 2004Open the Tome
Certain poisonous plants of EgyptSayed H. Hilal, Heber W. Youngken, Heber Wilkinson Youngken, Jamʻīyah al-Ṣaydalīyah al-Miṣrīyah · First published 1983Open the Tome
