Published, 2020: title page (Thomas Deetjen; a book for novice science and engineering researchers that covers productivity philosophies and a step-by-step task-oriented plan for tackling the research process)

ThomasDeetjen.com, February 16, 2021 (Thomas Deetjen; focus on energy systems research and renewable energy sources)

OCLC, February 16, 2021: (access point: Deetjen, Thomas A.; Deetjen, Thomas ; usage: Thomas A. Deetjen; Thomas Deetjen)