المؤلفون: Headley, J.C.

المصدر: http://ageconsearch.umn.edu/record/323660.

Relation: https://ageconsearch.umn.edu/record/323660/files/agecon-waea-1000.pdf; http://ageconsearch.umn.edu/record/323660

الاتاحة: https://doi.org/10.22004/ag.econ.323660
http://ageconsearch.umn.edu/record/323660
https://ageconsearch.umn.edu/record/323660/files/agecon-waea-1000.pdf

المؤلفون: Headley, J.C., Taylor, C.R., Sundell, Bjorn

المصدر: http://ageconsearch.umn.edu/record/283617.

Relation: https://ageconsearch.umn.edu/record/283617/files/19-00105AAEA_0641.pdf; http://ageconsearch.umn.edu/record/283617

الاتاحة: https://doi.org/10.22004/ag.econ.283617
http://ageconsearch.umn.edu/record/283617
https://ageconsearch.umn.edu/record/283617/files/19-00105AAEA_0641.pdf

المؤلفون: Headley, J.C.

المصدر: http://ageconsearch.umn.edu/record/260103.

Relation: https://ageconsearch.umn.edu/record/260103/files/Article09.pdf; http://ageconsearch.umn.edu/record/260103

الاتاحة: https://doi.org/10.22004/ag.econ.260103
http://ageconsearch.umn.edu/record/260103
https://ageconsearch.umn.edu/record/260103/files/Article09.pdf

المؤلفون: Headley, J.C., Lewis, J.N.

المصدر: ISBN 9781315660882.

الاتاحة: http://dx.doi.org/10.4324/9781315660882

المؤلفون: Headley, J.C.

المصدر: Proceedings, Annual Meeting (Western Agricultural Economics Association), 1970 Jul . 43, 271-275.

URL الوصول: https://www.jstor.org/stable/43915623

المؤلفون: Headley, J.C., Bentz, R.P.

المصدر: Poultry Science ; volume 43, issue 1, page 15-24 ; ISSN 0032-5791

الاتاحة: http://dx.doi.org/10.3382/ps.0430015
https://api.elsevier.com/content/article/PII:S003257911943160X?httpAccept=text/xml
https://api.elsevier.com/content/article/PII:S003257911943160X?httpAccept=text/plain
http://academic.oup.com/ps/article-pdf/43/1/15/4371872/poultrysci43-0015.pdf

المؤلفون: Headley, J.C.

المصدر: American Journal of Agricultural Economics. Feb68, Vol. 50 Issue 1, p13. 11p.

مصطلحات موضوعية: *TECHNOLOGICAL innovations, CONTROL of agricultural pests & diseases, PESTICIDES, AGRICULTURAL productivity, MATHEMATICAL models of agricultural economics, FERTILIZERS

المؤلفون: Headley, J.C.

المصدر: Journal of Farm Economics. Dec65, Vol. 47 Issue 5, p1437. 3p.

مصطلحات موضوعية: *INDUSTRIAL management, AGRICULTURE

المؤلفون: Headley, J.C.

المصدر: Biology Control in Agriculture Ipm System ; page 53-63 ; ISBN 9780123570307

الاتاحة: http://dx.doi.org/10.1016/b978-0-12-357030-7.50010-7

المؤلفون: Headley, J.C.

المصدر: EPPO Bulletin ; volume 3, issue 3, page 51-59 ; ISSN 0250-8052 1365-2338

الاتاحة: http://dx.doi.org/10.1111/j.1365-2338.1973.tb02672.x
https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-2338.1973.tb02672.x
https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-2338.1973.tb02672.x

المؤلفون: Justus, Fred, Headley, J.C., Krause, Kenneth R., Schultz, S. Ray, Shaudys, E.T., Nodland, Truman, Hobbs, Daryl J., Warrack, Allan A., Wirth, M.E.

مصطلحات موضوعية: Farming, human factor, NC-59 project, management model, Farm management

Relation: Technical Bulletin (University of Minnesota, Agricultural Experiment Station.);258; North Central Regional Research Publication;184; http://hdl.handle.net/11299/182415

الاتاحة: http://hdl.handle.net/11299/182415

المؤلفون: Headley, J.C.

Relation: https://ageconsearch.umn.edu/record/260103/files/Article09.pdf

الاتاحة: https://ageconsearch.umn.edu/record/260103/files/Article09.pdf

المؤلفون: Headley, J.C., Taylor, C.R., Sundell, Bjorn

Relation: https://ageconsearch.umn.edu/record/283617/files/19-00105AAEA_0641.pdf

الاتاحة: https://ageconsearch.umn.edu/record/283617/files/19-00105AAEA_0641.pdf