Columbia subject headings:
Floods--Social aspects--Mexico--Piedras Negras.
Floods--Social aspects--Rio Grande (Colo.-Mexico and Tex.)--Case studies.
Floods--Social aspects--Texas--Eagle Pass.
Harvard subject headings:
Floods--Social aspects--Mexico--Piedras Negras.
Floods--Social aspects--Rio Grande (Colo.-Mexico and Tex.)--Case studies.
Floods--Social aspects--Texas--Eagle Pass.
Rio Grande (Colo.-Mexico and Tex.)--Floods--Case studies.
Princeton subject headings: