Hallowell 1951, pp. 51–52. Hallowell, Howard Thomas Sr (1951), How a Farm Boy Built a Successful Corporation: An Autobiography, Jenkintown, Pennsylvania, USA: Standard Pressed Steel Company, LCCN52001275, OCLC521866.
Hallowell 1951, p. 51. Hallowell, Howard Thomas Sr (1951), How a Farm Boy Built a Successful Corporation: An Autobiography, Jenkintown, Pennsylvania, USA: Standard Pressed Steel Company, LCCN52001275, OCLC521866.
Hallowell 1951, p. 52. Hallowell, Howard Thomas Sr (1951), How a Farm Boy Built a Successful Corporation: An Autobiography, Jenkintown, Pennsylvania, USA: Standard Pressed Steel Company, LCCN52001275, OCLC521866.
Hallowell 1951, pp. 54, 57–59. Hallowell, Howard Thomas Sr (1951), How a Farm Boy Built a Successful Corporation: An Autobiography, Jenkintown, Pennsylvania, USA: Standard Pressed Steel Company, LCCN52001275, OCLC521866.
Hallowell 1951, p. 54. Hallowell, Howard Thomas Sr (1951), How a Farm Boy Built a Successful Corporation: An Autobiography, Jenkintown, Pennsylvania, USA: Standard Pressed Steel Company, LCCN52001275, OCLC521866.
Pilloton, Emily (2020). Girls garage: how to use any tool, tackle any project, and build the world you want to see. Kate Bingaman-Burt. San Francisco, California. p. 110. ISBN978-1-4521-6637-7. OCLC1155316269.{{cite book}}: CS1 maint: location missing publisher (link)
Hallowell 1951, pp. 51–52. Hallowell, Howard Thomas Sr (1951), How a Farm Boy Built a Successful Corporation: An Autobiography, Jenkintown, Pennsylvania, USA: Standard Pressed Steel Company, LCCN52001275, OCLC521866.
Hallowell 1951, p. 51. Hallowell, Howard Thomas Sr (1951), How a Farm Boy Built a Successful Corporation: An Autobiography, Jenkintown, Pennsylvania, USA: Standard Pressed Steel Company, LCCN52001275, OCLC521866.
Hallowell 1951, p. 52. Hallowell, Howard Thomas Sr (1951), How a Farm Boy Built a Successful Corporation: An Autobiography, Jenkintown, Pennsylvania, USA: Standard Pressed Steel Company, LCCN52001275, OCLC521866.
Hallowell 1951, pp. 54, 57–59. Hallowell, Howard Thomas Sr (1951), How a Farm Boy Built a Successful Corporation: An Autobiography, Jenkintown, Pennsylvania, USA: Standard Pressed Steel Company, LCCN52001275, OCLC521866.
Hallowell 1951, p. 54. Hallowell, Howard Thomas Sr (1951), How a Farm Boy Built a Successful Corporation: An Autobiography, Jenkintown, Pennsylvania, USA: Standard Pressed Steel Company, LCCN52001275, OCLC521866.
Brewer, Dennis C. (2012). Build your own free-to-air (FTA) satellite TV system. New York: McGraw-Hill. p. 13. ISBN978-0-07-177516-8. OCLC778421711.