किसने तृतीयक स्रोतों (Tertiary sources) को 'सूचना के ऐसे स्रोत जो सबसे अंत में सामने आते हैं और जिनमें अधिकतर विषय का ज्ञान शामिल नहीं होता' के रूप में परिभाषित किया है?

Which of the following entities publish administrative reports? i. Ministries ii. Departments iii. Scientists iv. Associations v. Scholars

According to Dennis Grogan, a primary source of information has which of the following main features? i. Contains original contributions. ii. Contains a condensed form of the latest literature of the subject. iii. Results of the research are usually first reported. iv. Contains only information about information.