Columbia subject headings:
Guano--Peru.
Naturalists--Peru--Biography.
Peru--Discovery and exploration.
Raimondi, Antonio, 1826-1890.
Saltpeter.
Harvard subject headings:
Guano--Peru.
Naturalists--Peru--Biography.
Peru--Discovery and exploration.
Raimondi, Antonio, 1826-1890.
Saltpeter.
Princeton subject headings:
Guano industry--Peru--History--19th century--Sources.
Guano--Peru--History--19th century--Sources.
Peru--Economic conditions--19th century--Sources.
Raimondi, Antonio.
Saltpeter industry--Peru--History--19th century--Sources.
Saltpeter--Peru--History--19th century--Sources.