@other{https://resolver.caltech.edu/CaltechTHESIS:04112011-111843025,
    title = "Transport of Natural Lead and Cadmium in Rivers: Global Flux Implications",
    year = "1991",
    url = "https://resolver.caltech.edu/CaltechTHESIS:04112011-111843025",
    id = "record",
    doi = "10.7907/1RX3-W586"
}