@BOOK{NAP12341, title = "On the Decision to Place the High Resolution Solar Observatory Project on Hold: Letter Report", doi = "10.17226/12341", url = "https://nap.nationalacademies.org/catalog/12341/on-the-decision-to-place-the-high-resolution-solar-observatory-project-on-hold", year = 1987, publisher = "The National Academies Press", address = "Washington, DC" }