Horst Dippel 
Rio Grande – Texas [PDF ebook] 

The seven-volume edition contains about 500 constitutional texts, constitutional amendments, failed constitutions and draft constitutions from the United States, all in their original languages and alphabetically ordered. The texts, including some rare original versions, have been edited and annotated on the basis of the printed official state documents and conventions, consulting the original manuscripts. The constitutional documents from Rio Grande to Texas are published in volume VI and the constitutional documents from Vermont to Wisconsin are published in volume VII.

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