Primary Sources: e.g. Photos taken at the laboratories, interviews, surveys, Journals, data experimental results( Primary sources are those created by direct o bservation authors were participants in or observers of the events For scientific papers, writers use mainly experimental results/data or observations which they conducted themselves However. secondary sources are often useful Secondary Sources: e.g. Abstracts, textbooks, government documents are written by people with indirect knowledge. They rely on primary sources Authors frequently use journals 4.1 Periodicals/Journals Numerous specialists journals are available. Reviews of our particular speciality will be a good entry point for our information gathering e.g. Reviews on Flameless Atomization Techniques4 Primary Sources: e.g. Photos taken at the laboratories, interviews, surveys, Journals, data & experimental results ( Primary sources are those created by direct observation. authors were participants in or observers of the events For scientific papers, writers use mainly experimental results/data or observations which they conducted themselves. However, secondary sources are often useful: Secondary Sources: e.g. Abstracts, textbooks, government documents are written by people with indirect knowledge. They rely on primary sources. Authors frequently use journals: 4.1 Periodicals/Journals Numerous specialists journals are available. Reviews of our particular speciality will be a good entry point for our information gathering. e.g. Reviews on Flameless Atomization Techniques