Rcent German research on problems of parasitology animal health and animal breeding in the topics and subtopcs

by Markl, Hubert, Markl, Hubert, Bittner, Alfred
Published 1984

Water reuse : selected reports on water reuse in urban and rural areas /

by Neis, Uwe
Published 1984

Water reuse : selected reports on water reuse in urban and rural áreas /

Published 1984

Bibliografía boliviana de ecología /

by Cardozo Saravia, Consuelo
Published 1989