@other{https://resolver.caltech.edu/CaltechETD:etd-10282008-143946,
    title = "Semiconvection in halo stars and primordial helium abundance",
    year = "1976",
    url = "https://resolver.caltech.edu/CaltechETD:etd-10282008-143946",
    id = "record",
    doi = "10.7907/J7AW-9943"
}