Maria Geertruida Elisabeth (ria) Exel ( 1915 - 1985 ) was a painter. Maria Geertruida Elisabeth (ria) Exel s works have been put up for auction numerous times, with realized prices varying from 83.04 USD for Portret van Hans en Flos Oosthoek in 2004 to 133.92 USD for Le cantique de Salomon. in 2007 , based on the size and medium of the artwork.