00738nam a2200229Ia 4500001000700000003000500007005001700012008004100029020001500070040001900085100002200104245011100126260006300237300001600300336000800316337001600324338001900340504002700359700003200386700002900418650006100447231073BIBL20180911122412.0820426s1980    pr a     b    00000 spa    a0913480460  aEVLGbspaerda10aDuncan, Ronald J.10aManual de técnicas de investigación social /cRonald J. Duncan, Rodolfo Rodríguez, George Uzdavinis.0 aSan Juan, P.R. :bInter American University Press ,c1980.  a73 p.bill.  btxt  2rdamediabn  2rdacarrierbnc  aBibliography: p. 72-7310aRodríguez, Rodolfod1942-10aUzdavinis, Georged1930- 0aSocial science researchxHandbooks, manuals, etc.2Local