Heinrich's original work is not easy to find with his books out of print for several decades. However, some can be found online and hopefully more will be accessible in the future. Below you will find links to some of the original texts by Heinrich that are to be found on the web.

The numbering of sources corresponds to the referencing in my book.

Heinrich, H.W. (1927b) Incidental Cost of Accidents to the Employer. Monthly Labor Review, 25 (2): 46-50.

https://www.jstor.org/stable/pdf/41860526.pdf 

Heinrich, H.W. (1929c) Relation Of Accident Statistics To Industrial Accident Prevention. Proceedings of the Casualty Actuarial Society 1929-1930: 170-174.

http://www.casact.org/pubs/proceed/proceed29/29170.pdf 

Heinrich, H.W. (1930a) The Foreman's Responsibility for Accidents. Monthly Labor Review, 30 (2): 83-88.

https://www.jstor.org/stable/pdf/41860803.pdf 

Heinrich, H.W. (1930c) Cost of Industrial Accidents to the State, the Employer, and the Man. Monthly Labor Review, 31 (5): 72-87.

https://www.jstor.org/stable/pdf/41813913.pdf 

Heinrich, H.W. (1941) Industrial Accident Prevention (second edition). New York: McGraw-Hill.

https://archive.org/details/dli.ernet.14601/page/n5/mode/2up

Heinrich, H.W. (1944) Basics of Supervision. New York: Alfred M. Best Company.

https://babel.hathitrust.org/cgi/pt?id=wu.89083912915&view=1up&seq=11 

Heinrich, H.W. (1949) Formula for Supervision: Outlining the Application of Supervisory Control to Secure, Safe, Efficient Work Performance. New York: National Foremen’s Institute, Inc.

https://babel.hathitrust.org/cgi/pt?id=uc1.b4147137&view=1up&seq=7 

ASME (1947) Form for Use in Self-Appraisal of Industrial Plants. New York: The American Society of Mechanical Engineers.

https://babel.hathitrust.org/cgi/pt?id=uc1.b4182902&view=1up&seq=15  

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