1. Bacharach Sling Psychrometer Manual, Rev. 7; Bacharach: New Kensington, PA, USA, 2017; https://www.instrumart.com/assets/Bacharach-Sling-Psychrometer-manual.pdf
2. Guide to Meteorological Instrumentation and Methods of Observation, WMO-No.8, 7th ed.; World Meteorological Organization: Geneva, Switzerland, 2008. ISBN 978-92-63-100085
3. Principles of Non-Contact Temperature Measurements;Gruner,2003