https://doi.org/10.11588/ger.1960.3/4
https://doi.org/10.11588/ger.1960.1/2
https://doi.org/10.11588/ger.1959.1
https://doi.org/10.11588/ger.1958.3
https://doi.org/10.11588/ger.1958.0
https://doi.org/10.11588/ger.1957.0
https://doi.org/10.11588/ger.1957.1-2
https://doi.org/10.11588/ger.1956.0
https://doi.org/10.11588/ger.1956.1-2
https://doi.org/10.11588/ger.1955.4
https://doi.org/10.11588/ger.1955.3
https://doi.org/10.11588/ger.1955.0
https://doi.org/10.11588/ger.1954.4
https://doi.org/10.11588/ger.1954.3
https://doi.org/10.11588/ger.1954.0
https://doi.org/10.11588/ger.1953.0
https://doi.org/10.11588/ger.1953.1-2
https://doi.org/10.11588/ger.1952.0
https://doi.org/10.11588/ger.1952.2
https://doi.org/10.11588/ger.1952.1
https://doi.org/10.11588/ger.1951.3
https://doi.org/10.11588/ger.1951.0
https://doi.org/10.11588/ger.1944.0
https://doi.org/10.11588/ger.1944.1-2
https://doi.org/10.11588/ger.1943.0
https://doi.org/10.11588/ger.1943.2
https://doi.org/10.11588/ger.1943.1
https://doi.org/10.11588/ger.1942.4
https://doi.org/10.11588/ger.0.0
https://doi.org/10.11588/ger.1942.1
https://doi.org/10.11588/ger.1941.4
https://doi.org/10.11588/ger.1941.3
https://doi.org/10.11588/ger.1941.2
https://doi.org/10.11588/ger.1941.1
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https://doi.org/10.11588/ger.1940.2
https://doi.org/10.11588/ger.1940.1
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https://doi.org/10.11588/ger.1939.1
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https://doi.org/10.11588/ger.1938.2
https://doi.org/10.11588/ger.1938.1
https://doi.org/10.11588/ger.1937.4
https://doi.org/10.11588/ger.1937.3
https://doi.org/10.11588/ger.1937.2
https://doi.org/10.11588/ger.1937.1