- 23
April 2017.
Teynor TM,
Putnam DH, Doll JD,
Kelling KA,
Oelke EA,
Undersander DJ,
Oplinger ES (February 1992). "Comfrey".
Alternative Field Crops Manual...
- ...6.3240S. doi:10.1126/sciadv.aay3240. PMC 7065883. PMID 32195345.
Undersander DJ,
Oelke EA,
Kaminski AR, Doll JD,
Putnam DH,
Combs SM,
Hanson CV (1990)...
- (3): 409–18. doi:10.1007/s13197-011-0522-x. PMC 3931889. PMID 24587515.
Undersander D. J.,
Putnam D. H.,
Kaminski A. R., Doll J. D.,
Oblinger E. S. and Gunsolus...
-
Farming Systems Trial".
Rodale Institute.
Retrieved 24
February 2014.
Undersander, Dan; et al. "Pastures for Profit: A
Guide to
Rotational Grazing" (PDF)...
- copy as
title (link)
Teynor TM,
Putnam DH, Doll JD, Kelling,
Oelke EA,
Undersander DJ,
Oplinger ES (1997). "Comfrey".
Alternative Field Crops Manual. University...
- Aaron; Wijmans, Erik; Maksymets, Oleksandr; Clegg, Alex; Turner, John;
Undersander, Eric; Galuba, Wojciech; Westbury, Andrew; Chang,
Angel X.; Savva, Manolis...
- Letters". CollectGBStamps.
Archived from the
original on 6
January 2022.
Undersander, Dan, Ed.;
Catalog of the 20th and 21st
Century Stamped Envelopes and...
- 1874 to 1885, UPSS (2010).
Undersander, Dan, Ed.; U.S. 19th
Century Stamped Envelopes and Wrappers; UPSS (2012).
Undersander, Dan, Ed.;
Catalog of the...
- 2408. ISBN 978-0-8493-1303-5. Cosgrove, Dennis;
Michael Casler; Dan
Undersander (1999-12-02). "Rygr****
types for
pasture and hay".
Agronomy Advice. Department...
- 2020-02-06.
Archived from the
original on 2021-11-17.
Retrieved 2020-10-16.
Undersander, Dan; Albert, Beth; Cosgrove, Dennis; Johnson, Dennis; Peterson, Paul...
