Dalhart Windberg "pelican On A Post 16×20 Framed 1968 Oil

This  original oil painting was painted by Barbara Marx which was copied from Dalhart Windberg "Pelican on a Post. I have had this painting for over 30 yrs and it was given to me by my partner at the time grandmother . I am not sure how long she had it for. It  is in the original wooden frame. The canvas itsself is 16×20 and with frame it is 24 1/2 × 28 1/2 It is signed  by Barbara Marx . It is in beautiful condition because I have had it stored in a box when I didn't have it on wall.. I received this in my hometown of Round Rock ,Texas. not sure if that is important to know ,but I thought I might add as much information about it as possible.  if any questions please message me and I will be  happy to answer..