00751cas a2200169 a 450000500170000000800410001703500150005805000210007310000240009424501360011826000450025430000100029949000710030965000290038065100390040981001330044820260817162849.0050422s1977    us uu|m rtt   0|  a1eng d  a.b10676867 4aHM131bO33 no.461 aRoberto, Eduardo L.14aThe application of diffusion models to population programs :bthe Philippine case of the commercial contraceptive marketing program  aColombus :bOhio State University,c1977  a19 p.1 aStudies in the diffusion of innovation, discussion paper ;vno. 46 0aDiffusion of innovations 0aPhilippines (Republic)xPopulation1 aOhio.bState University, Columbus.bDepartment of Geography.tStudies in the diffusion of innovation, discussion paper ;vno. 46