Columbia subject headings:
Endangered plants--California--San Luis Obispo County.
Plant conservation--California--San Luis Obispo County.
Snails--California--San Luis Obispo County.
Harvard subject headings:
Endangered plants--California--San Luis Obispo County.
Plant conservation--California--San Luis Obispo County.
Snails--California--San Luis Obispo County.
Princeton subject headings:
Endangered plants--California--San Luis Obispo County.
Plant conservation--California--San Luis Obispo County.
Snails--California--San Luis Obispo County.