Grobecker, C. (1996). Water and nitrogen balances for the upper Rhine catchment area.
Lua i Stíl Chicago (17ú heag.)Grobecker, Claire. Water and Nitrogen Balances for the Upper Rhine Catchment Area. Wiesbaden, 1996.
Lua MLA (8ú heag.)Grobecker, Claire. Water and Nitrogen Balances for the Upper Rhine Catchment Area. 1996.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.