Pacific Coast Professional Football League (English Wikipedia)

PCPFL: 1940-45 Archived July 26, 2011, at the Wayback Machine – Bob Gill, The Coffin Corner, Pro Football Researchers Association (1982)
The End of the PCPFL Archived November 27, 2010, at the Wayback Machine – Bob Gill, The Coffin Corner, Pro Football Researchers Association (1983)
The Bulldogs: L.A. Hits the Big Time Archived November 27, 2010, at the Wayback Machine – Bob Gill, Pro Football Researchers Association (1984)
Other Minor Leagues Archived November 27, 2010, at the Wayback Machine – a look at football's minor leagues before 1960, Bob Gill, The Coffin Corner, Pro Football Researchers Association (1989).
"THE COFFIN CORNER: Vol. 31, No. 1 (2009)" (PDF). THE COFFIN CORNER.
Other Minor Leagues Archived November 27, 2010, at the Wayback Machine – a look at football's minor leagues before 1960, Bob Gill, The Coffin Corner, Pro Football Researchers Association (1989)
California Dreamin': West Coast Pros in the 1930s – Bob Gill and Tod Maher, The Coffin Corner, Pro Football Researchers Association (1984)
"The Salt Lake Seagulls" (PDF).
Tacoma Story Archived November 26, 2010, at the Wayback Machine – Bart Ripp, The Coffin Corner, Pro Football Researchers Association (2002)
The Salt Lake Seagulls Archived October 7, 2010, at the Wayback Machine – Mel Bashore, The Coffin Corner, Pro Football Researchers Association (1992)
The Salt Lake Seagulls – Mel Bashore, The Coffin Corner, Pro Football Researchers Association (1992)

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PCPFL: 1940-45 Archived July 26, 2011, at the Wayback Machine – Bob Gill, The Coffin Corner, Pro Football Researchers Association (1982)
The End of the PCPFL Archived November 27, 2010, at the Wayback Machine – Bob Gill, The Coffin Corner, Pro Football Researchers Association (1983)
The Bulldogs: L.A. Hits the Big Time Archived November 27, 2010, at the Wayback Machine – Bob Gill, Pro Football Researchers Association (1984)
Other Minor Leagues Archived November 27, 2010, at the Wayback Machine – a look at football's minor leagues before 1960, Bob Gill, The Coffin Corner, Pro Football Researchers Association (1989).
Other Minor Leagues Archived November 27, 2010, at the Wayback Machine – a look at football's minor leagues before 1960, Bob Gill, The Coffin Corner, Pro Football Researchers Association (1989)
"Professional Football Researchers Association- Pro Football History". www.footballresearch.com. Archived from the original on March 19, 2006. Retrieved January 12, 2022.
Tacoma Story Archived November 26, 2010, at the Wayback Machine – Bart Ripp, The Coffin Corner, Pro Football Researchers Association (2002)
The Salt Lake Seagulls Archived October 7, 2010, at the Wayback Machine – Mel Bashore, The Coffin Corner, Pro Football Researchers Association (1992)
"NWFL Archives League Standings 1979-1986". Archived from the original on November 11, 1999.