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14.800/285 -- PUERTO-RICO -- Puerto Rico.A study in democratic development.Ed.by Millard Hansen,Henry Wells. - Philadelphia:Acad.1953.VIII,246 S.m.3 Tab. -- 8° -- (The Annals of the American Academy of political and social science.Vol.285.) -- 1975:4495. -- Wi.
The Annals of the American Academy of political and social science Vol.285