Zobrazeno 1 - 10
of 294
pro vyhledávání: '"Douglas Helms"'
Autor:
Effland, Anne
Publikováno v:
Agricultural History, 2019 Jan 01. 93(1), 173-178.
Externí odkaz:
https://www.jstor.org/stable/10.3098/ah.2019.093.1.173
Autor:
Trimble, Stanley W.
Publikováno v:
Agricultural History, 2015 Oct 01. 89(4), 597-599.
Externí odkaz:
https://www.jstor.org/stable/10.3098/ah.2015.089.4.597
Autor:
Eash, Neal
Publikováno v:
NACTA Journal, 2005 Jun 01. 49(2), 92-93.
Externí odkaz:
https://www.jstor.org/stable/43765959
Publikováno v:
Isis, 2002 Sep . 93(3), 550-550.
Externí odkaz:
https://www.jstor.org/stable/10.1086/374166
Autor:
Mergen, Bernard
Publikováno v:
American Studies International, 2002 Jun 01. 40(2), 112-113.
Externí odkaz:
https://www.jstor.org/stable/41279910
Autor:
Anderson, William Dyer
Publikováno v:
American Journal of Agricultural Economics, 1986 Aug 01. 68(3), 757-760.
Externí odkaz:
https://www.jstor.org/stable/1241573
Autor:
Frana, Philip L.
Publikováno v:
Agricultural History, 2003 Oct 01. 77(4), 626-627.
Externí odkaz:
https://www.jstor.org/stable/3744945
Publikováno v:
Encyclopedia of Soil Science, Third Edition ISBN: 9781315161860
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::827d258d078e8954330c320acb9775dc
https://doi.org/10.1081/e-ess3-120042708
https://doi.org/10.1081/e-ess3-120042708
Autor:
Douglas Helms
Publikováno v:
Agricultural History. 92:124
Autor:
Douglas Helms
Publikováno v:
Journal of Soil and Water Conservation. 64:68A-74A
This article is a continuation of the historical developments discussed in “Hugh Hammond Bennett and the creation of the Soil Erosion Service,” Journal of Soil and Water Conservation , Volume 64, Number 2, pages 68A-74A. The article discusses the