@inbook{10.7312/pian16242.13, URL = {http://www.jstor.org/stable/10.7312/pian16242.13}, bookauthor = {CLAUDE A. PIANTADOSI}, booktitle = {Mankind Beyond Earth: The History, Science, and Future of Human Space Exploration}, pages = {169--187}, publisher = {Columbia University Press}, title = {THE COSMIC RAY DILEMMA}, year = {2012} }