David Thomas settled in Darby, Pennsylvania in 1714.

This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it.

This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it.

ABC-krigens omfang, mål og midler med vægt på beskyttelse mod kernevåben-angreb, især af civilbefolkningen.