@base .
a ;
.
a .
[
] .
a ;
"0027-9358" ;
.
a , ;
"National geographic (Print)" .
"District of Columbia" .
a ;
"20231009064345.151200"^^ ;
;
.
, ;
"National geographic." ;
, ;
;
"1536-6596" ;
;
, ;
;
;
"National geographic (Print)" , "National geographic." ;
;
"http://magma.nationalgeographic.com/ngm/data/html/home_refresh.html" .
.