https://www.ashrae.org/file%20library/technical%20resources/standards%20and%20guidelines/standards%20addenda/170-2017/170_2017_p_20200302.pdf
File Type:
www
Categories:
Regulation/Standards
https://www.ashrae.org/file%20library/technical%20resources/standards%20and%20guidelines/standards%20addenda/170-2017/170_2017_p_20200302.pdf
I scanned and uploaded this book to the Internet Archive 600dpi colour for anyone interested: https://archive.org/details/applications-of-germicidal-erythemal-and-infrared-energy-by-matthew-luckiesh