Soil Acidity, eds B. Ulrich & M. E. Sumner. xiii + 224 pp. Berlin: Springer Verlag (1991). DM 138.00 (hardback). ISBN 3 540 50782 5. | The Journal of Agricultural Science | Cambridge Core
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Germany Federal Republic 5 Deutsche Mark, 1991, P-37, UNC | eBay
Five Marks 1991, Coin from Germany - Online Coin Club
1 oz Silver (Deutsche Silberunze - 5 Deutsche Mark) - Federal Republic of Germany – Numista