E[conomia] & S[ociologica] R[ural].

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110 2 ⊔ ‡aUniversity of Puerto Rico (Río Piedras Campus). ‡bAgricultural Experiment Station.
245 1 0 ‡aE[conomia] & S[ociologica] R[ural].
247 1 0 ‡f1-13, ‡aE[conomia] A[gricola].
264 ⊔ 1 ‡aRío Piedras : ‡b[publisher not identified].
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362 0 ⊔ ‡a1- Nov.1947-
500 ⊔ ⊔ ‡a"Las iniciales E. & S.R. significan Ecnomia y Sociologia Rural y substituyen a E.A. (Economia Agricola)"- no.17, p.19.
538 ⊔ ⊔ ‡aMode of access: Internet.
546 ⊔ ⊔ ‡aSpanish and English (A few numbers in English have title: E. & R.S.).
650 ⊔ 0 ‡aAgriculture ‡zPuerto Rico.
710 2 2 ‡aUniversity of Puerto Rico (Río Piedras Campus). ‡bAgricultural Experiment Station. ‡tE.A.
710 2 2 ‡aUniversity of Puerto Rico (Río Piedras Campus). ‡bAgricultural Experiment Station. ‡tE. & S.R.
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