作者:Lundquist, Janerik,1943-,Hinterhuber, Hans H.,1938-,Grubbstrom, Robert W.,1941-,International Working Seminar on Production EconomicsIgls, Austria)1990 :(6th :
出版資料:New York : Distributors for the U.S. and Canada, Elsevier Science Pub. Co., 1991.
作者:Boren, H.1943-(Hans),,Grimvall, A.1945-(Anders),,International Symposium on Humic Substances in the Aquatic and Terrestrial EnvironmentLinkoping, Sweden)(1989 :,Allard, B.1945-(Bert),