In the collection of data the reader must itself be informed who with the research gets itself given that they need stops to answer to the problem in question. The data can be dealt with quantitative form when it is used of statistical procedures, that is, to measure the frequency of the investigated phenomenon, or […]

Oyarzn, et al. (1984). Garci’a, Towers & Shasat (1986) in its seventy studied cases had found one with a bigger number of laryngitis cases and nodules: As the professor occupation. Young chicken & Furck (1988) had justified that alterations in the voice of the professor they lead, the linguistic models and psychological inadequate, a time […]