2024 2 USC 176 – Mass Book Deacidification Facility; operation by Librarian of Congress

2023 2 USC 176 – Mass Book Deacidification Facility; operation by Librarian of Congress

2022 2 USC 176 – Mass Book Deacidification Facility; operation by Librarian of Congress

2021 2 USC 176 – Mass Book Deacidification Facility; operation by Librarian of Congress

2020 2 USC 176 – Mass Book Deacidification Facility; operation by Librarian of Congress

2018 2 USC 176 – Mass Book Deacidification Facility; operation by Librarian of Congress

2017 2 USC 176 – Mass Book Deacidification Facility; operation by Librarian of Congress

2015 2 USC 176 – Mass Book Deacidification Facility; operation by Librarian of Congress

2014 2 USC 176 – Mass Book Deacidification Facility; operation by Librarian of Congress