Columbia subject headings:
Environmental protection--California.
Science--California--History.
Science--California--Societies, etc.--History.
Scientists--California.
Harvard subject headings:
Environmental protection--California.
Science--California--History.
Science--California--Societies, etc.--History.
Scientists--California.
Princeton subject headings:
Environmental protection--California.
Science--California--History.
Science--California--Societies, etc.--History.
Scientists--California.