@inbook {1709, title = {Indigenous and cultivated plants as bioindicators}, booktitle = {Biologic Markers of Air-Pollution Stress and Damage in Forests}, year = {1989}, pages = {194-204}, publisher = {National Academy Press}, organization = {National Academy Press}, address = {Washington DC}, author = {Weinstein, L.H. and Laurence, J.A.} }