Seeking an expert on Roerich
 

Gentlemen
It is necessary to attribute a small work of Nicholas Roerich. Who are the experts Grabar, State Tretyakov Gallery, State Research Institute, ArtKonsaltinga, RM specializes this author?
Provenance good. He showed the work of Grabar expert G.. Oh. Her opinions about the Roerich not written on cardboard caused confusion and doubt in specialized in Roerich the expert.
Who do you recommend?
Nicholas Roerich Museum as I know does not give opinions or advice on authorship.