@inbook{https://resolver.caltech.edu/CaltechAUTHORS:20181204-102730480, title = "Recycling Intergalactic and Interstellar Matter", chapter = "Molecular Gas in the Edge-On Galaxy NGC 4013", url = "https://resolver.caltech.edu/CaltechAUTHORS:20181204-102730480", id = "record", isbn = "9781583811665", doi = "10.1017/S0074180900197359" } @inbook{https://resolver.caltech.edu/CaltechAUTHORS:20201117-175541343, title = "Submillimetre Astronomy", chapter = "Molecular spiral structure in M51", url = "https://resolver.caltech.edu/CaltechAUTHORS:20201117-175541343", id = "record", isbn = "9789401568524", doi = "10.1007/978-94-015-6850-0\_91" }