1950.
Ed. of 1950.
Map
JLC Title 245h
[cartographic material]
1951.
1st ed.-AMS.
Map
JLC Title 245h
[cartographic material]
1954.
Map
JLC Title 245h
[cartographic material] :
[1997]
Microform
JLC Title 245h
[microform] :
[1997]
Microform
JLC Title 245h
[microform] :
2004.
Electronic resource
JLC Title 245h
[electronic resource]
1954.
Map
JLC Title 245h
[cartographic material] :
1981.
Minor revisions 1981.
Map
JLC Title 245h
[cartographic material] :
1973.
1954, minor revisions 1973.
Map
JLC Title 245h
[cartographic material] :