Answer:
1. the main idea of the article is all about the sources of information ( print and non-print materials )
2. print and non-print materials
3. Print materials refers to all paper publications while non-print materials uses machine or digital equipment to access some sources of information.
4. Our sources of information are based on technology. The two sources of technology to gather information are print and non-print materials. Print materials are paperworks and non-print materials are needed to be accessed on digital equipments.
