TY  - ART
TI  - Clean air protection problems at national parks and wilderness areas : hearing before the Environment, Energy, and Natural Resources Subcommittee of the Committee on Government Operations, House of Representatives, One Hundred Third Congress, second session, April 29, 1994 — Illustration, Page 185
PY  - 1995
UR  - https://www.biodiversitylibrary.org/page/16603935
ID  - page-16603935
ER  -