Grazingland hydrology issues, c1996: t.p. (Kenneth E. Spaeth)

Spaeth, Kenneth E., Circle gardening, 2017: ECIP title page (Kenneth E. Spaeth Jr.)

OCLC, viewed February 17, 2017 (AAP: Spaeth, Kenneth E.; usage: Kenneth E. Spaeth Jr., Kenneth E. Spaeth)

USDA National Resources Conservation Service website, viewed February 17, 2017: West National Technology Support Center (Dr. Kenneth E. Spaeth; Rangeland Management Specialist in Fort Worth, TX; Ph.D. in Rangeland Hydrology and Ecology, Texas Tech University 1990; worked as a field Range Conservationist, District Conservationist, Area Range Conservationist, Technical Center Specialist, and Cooperating Scientist)

U.S. School Yearbooks, 1880-2012 via Ancestry.com, viewed February 17, 2017 (Kenneth Eugene Spaeth; born: about 1954; school: College of Emporia; location: Emporia, Kansas, USA; year 1974)

U.S. Public Records Index, 1950-1993, Volume 1, viewed February 17, 2017 (Kenneth E Spaeth Jr; born: November 3, 1950; residence: Lubbock, Texas)