'Of historic value, recreational value, or natural features, reason most nat'l parks are preserved'
natural values
NATIONAL PARKS: Of historic value, recreational value, or natural features, reason most natl parks are preserved
Of historic value, recreational value, or natural features, reason most nat'l parks are preserved
Of historic value, recreational value, or natural features, reason most nat'l parks are preserved
NATIONAL PARKS
natural values
NATIONAL PARKS