DescriptionDr. Jacob de Vlas is a Dutch biologist with a passion for field biology and photography. He received his PhD in 1983 from the University of Groningen in the Netherlands. Since then, he is i..
DescriptionThe authors of Illustrated Field Guide to the Flowers of Sri Lanka, Volume 2, Dr. Jacob de Vlas and his wife Johanna de Vlas-de Jong have been visiting Sri Lanka since 1977. In 2008, they p..