j a hellen

J. A. Hellen · Oxford University Press

48 sayfa · 1974

Economic conditions / Economic policy / Regional disparities / Regional planning / Wirtschaftslehre

Yola Verhasselt, J. A. Hellen · Avebury

295 sayfa · 1995

Medical care / Public health / Congresses / Environmental health / World Health

J. A. Hellen · Weltforum Verlag

297 sayfa · 1968

Agriculture / Economic aspects of Agriculture / Economic conditions / Natural resources / Conservation des ressources naturelles

J. A. Hellen, H. J. Diesfeld, I. F. Hellen, H. K. Hecklau · Springer London, Limited

Sayfa sayısı yok · 2013

Kategori yok