海量图书期刊资源,随时随地畅享阅读乐趣
Retreat from Salix—Swedish experience with energy crops in the 1990sPeter Helby; Håkan Rosenqvist; Anders Roos · 2006
A Double-blind Study Comparing Sulindac with Indomethacin in Rheumatoid ArthritisLund, Hans Ivar; Donde, René; Petersen, Peter Helby · Scandinavian Journal of Rheumatology · 1981
EKO-Energi—a public voluntary programme: targeted at Swedish firms with ambitious environmental goalsPeter Helby · 2002