Columbia subject headings:
City planning--Puerto Rico--San Juan--History.
San Juan (P.R.)--Buildings, structures, etc.
San Juan Metropolitan Area (P.R.)--History.
Harvard subject headings:
City planning--Puerto Rico--San Juan.
San Juan (P.R.)--Buildings, structures, etc.
San Juan (P.R.)--History.
San Juan Metropolitan Area (P.R.)--History.
Princeton subject headings:
City planning--Puerto Rico--San Juan--History.
San Juan (P.R.)--Buildings, structures, etc.
San Juan Metropolitan Area (P.R.)--History.