Hello,
I don’t speak very quite English, but I will try to express me clearly.
I would like to use a text of Ray brabury "fever dream" to adapt it in video animation. This with a nonlucrative aim but to present my work in little festivals.
I wanted to know with whom to address itself to ask for the authorization to use this novel. Thanks for your answers,

I believe fever dream was in "I sing the body electric"

I could be wrong.

actually I'm wrong

http://www.fantasticfiction.co.uk/b/ray-bradbury/fever-dream-night-lights.htm

Thanks, dandelion.

You're welcome. We've heard several times from people adapting stories for stage plays or films.