Columbia subject headings:
Baleine, Philippe de.
Chemin de fer Congo-océan.
Congo (Brazzaville)--Description and travel.
Railroad travel--Congo (Brazzaville)
Harvard subject headings:
Baleine, Philippe de.
Chemin de fer Congo-océan
Congo (Brazzaville)--Description and travel.
Railroad travel--Congo (Brazzaville)
Princeton subject headings:
Baleine, Philippe de--Travel--Congo (Brazzaville).
Congo (Brazzaville)--Description and travel.