@incollection{Al-Taweel19, author = {Shagufta Perveen and Areej Mohammad Al-Taweel}, title = {Introductory Chapter: Pharmacognosy}, booktitle = {Pharmacognosy}, publisher = {IntechOpen}, address = {Rijeka}, year = {2019}, editor = {Shagufta Perveen and Areej Al-Taweel}, chapter = {1}, doi = {10.5772/intechopen.86019}, url = {https://doi.org/10.5772/intechopen.86019} }