This is not my field and I recognize that I am not contributing any original material here but I thought about sharing some information about an historical document. 

According to the author of the following article, the 1957 scientific paper on astrophysics entitled Stellar Evolution, Nuclear Astrophysics and Nucleogenesis, or CRL-41, was difficult to find in any form until the expiration of the copyright on it made it possible to post copies.

The copy is offered on line, through this article, by Daid Kahl, a Ph.D. student at the University of Tokyo.