00312nam a2200109Ia 4500008004100000082001900041082000800060245010900068245000800177260000800185300000900193231017s9999 xx 000 0 und d a624.1510973PAT bPAT 3aAn Occurrence and Distribution Survey of Expansive Materials in the United States by Physiographic Areas 0cFHA bFHA c30cm