Industrial marketing research technique embraces three activities, the collection of data, the analysis of collected information and its interpretation. Information sources can be divided into two classes; primary and secondary. Bibliographical research is the backbone of secondary information sources. Secondary information sources are those which have been gathered by others, and which the researcher considers relevant in studying a particular problem. Correlation analysis is a method of measuring the relationship between two or more variables, the analysis indicating whether or not a relationship between the variables exists, the degree of relationship, time relationships and the reliability of the relationship for the purpose of forecasting. The analysis of company records by actuarial methods can also provide marketing research data. Trade Associations have an essential role to play as regards with both the circulation of information on European markets and the sponsoring and financing of basic surveys.