Litter origins, accumulation rates, and hierarchical composition on urban roadsides of the Inland Empire, California oleh Win Cowger, Andrew Gray, Hannah Hapich, Jasmine Osei-Enin, Salvador Olguin Jr, Britney Huynh, Hinako Nogi, Samiksha Singh, Stanley Brownlee, Jonathan Fong, Trevor Lok, Gideon Singer, Hoori Ajami