Paper  bibtex   

@article{swann_history_1961,
	title = {The {History} of {Cosmic} {Rays}},
	volume = {29},
	url = {http://aapt.scitation.org/doi/abs/10.1119/1.1937624},
	number = {12},
	urldate = {2017-03-31},
	journal = {American Journal of Physics},
	author = {Swann, William FG},
	year = {1961},
	pages = {811--816},
	file = {Snapshot:/Users/christopher/Zotero/storage/TPTVWZCS/1.html:text/html}
}