- A Foliose Lichen as a Potential Bioindicator/Biomonitor of Air Pollution in Philippines: An Update by Isidro T. Savillo*The National River Health Programme - South Africa
- A Foliose Lichen as a Potential Bioindicator/Biomonitor of Air Pollution in Philippines: An Update by Isidro A. T. Savillo*The National River Health Programme - South Africa