Columbia subject headings:
Authors, American--20th century--Correspondence.
Authors, American--20th century--Travel--Amazon River Region.
Ayahuasca.
Burroughs, William S., 1914-1997--Correspondence.
Burroughs, William S., 1914-1997--Travel--Amazon River Region.
Ginsberg, Allen, 1926-1997--Correspondence.
Ginsberg, Allen, 1926-1997--Travel--Amazon River Region.
Harvard subject headings:
Authors, American--20th century--Correspondence
Authors, American--20th century--Travel--Amazon River Region.
Ayahuasca.
Burroughs, William S., 1914---Correspondence.
Burroughs, William S., 1914-1997--Correspondence.
Burroughs, William S., 1914-1997--Travel--Amazon River Region.
Ginsberg, Allen, 1926---Correspondence.
Ginsberg, Allen, 1926---Travel--Amazon River Region.
Ginsberg, Allen, 1926-1997--Correspondence.
Ginsberg, Allen, 1926-1997--Travel--Amazon River Region.
Princeton subject headings:
Authors, American--20th century--Correspondence.
Authors, American--20th century--Travel--Amazon River Region.
Ayahuasca.
Burroughs, William S., 1914---Correspondence.
Burroughs, William S., 1914---Travel--Amazon River Region.
Ginsberg, Allen, 1926-1997--Correspondence.
Ginsberg, Allen, 1926-1997--Travel--Amazon River Region.