Columbia subject headings:
Harvard subject headings:
Ōkōchi, Masatoshi, 1878-1952
Rikagaku Kenkyūjo (Japan)
Riken Sangyōdan.
Princeton subject headings:
Ōkōchi, Masatoshi, 1878-1952.
Rikagaku Kenkyūjo (Japan)
Riken Sangyōdan.