著者名,書名,版表示,出版者名,出版年,シリーズ名,番号,ISBN,ISSN,URL
"Williams, C. M. and Hardaker, J. Brian",The small fen farm : problems and prospects of intensive arable smallholdings on skirt soils in the fens,,"Issued by the Farm Economics Branch, School of Agriculture, Cambridge University : in conjunction with National Agricultural Advisory Service, Cambridgeshire and Isle of Ely",1966,Occasional papers,,,,https://cir.nii.ac.jp/crid/1130000798255976320