/usr/share/acl2-8.0dfsg/books/nonstd/integrals/ is in acl2-books-source 8.0dfsg-1.
This file is owned by root:root, with mode 0o755.
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/usr/share/acl2-8.0dfsg/books/nonstd/integrals/continuous-function.lisp
/usr/share/acl2-8.0dfsg/books/nonstd/integrals/equivalence-continuous-function.lisp
/usr/share/acl2-8.0dfsg/books/nonstd/integrals/equivalence-ftc.lisp
/usr/share/acl2-8.0dfsg/books/nonstd/integrals/equivalence-integrals.lisp
/usr/share/acl2-8.0dfsg/books/nonstd/integrals/ftc-1.lisp
/usr/share/acl2-8.0dfsg/books/nonstd/integrals/ftc-2.lisp
/usr/share/acl2-8.0dfsg/books/nonstd/integrals/integrable-functions.lisp
/usr/share/acl2-8.0dfsg/books/nonstd/integrals/integral-of-polynomials.lisp
/usr/share/acl2-8.0dfsg/books/nonstd/integrals/integration-composition-equivalences.lisp
/usr/share/acl2-8.0dfsg/books/nonstd/integrals/integration-composition.lisp
/usr/share/acl2-8.0dfsg/books/nonstd/integrals/make-partition.lisp
/usr/share/acl2-8.0dfsg/books/nonstd/integrals/split-integral-by-subintervals.lisp