Investigation method is one of the most commonly used methods in scientific research. It is a purposeful, planned, and systematic method of collecting materials about the actual or historical conditions of the research object.
Investigation is one of the most commonly used methods in scientific research. It is a purposeful, planned and systematic method to collect materials about the real or historical situation of the research object.<br>
Investigation is one of the most commonly used methods in scientific research. It is a purposeful, planned and systematic method to collect materials about the actual or historical situation of the research object.