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121
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122
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123
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124
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125Published 1907“...Helwing ;...”
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126Published 1840“...Helwing,...”
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127by Bodenstedt, Friedrich, 1819-1892“...Helwing,...”
Published 1876
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128by Knorr, Emil“...Helwing,...”
Published 1880
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129by Adamy, Rudolf, 1850-1898“...Helwing,...”
Published 1881
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130by Leonhardt, Adolph, 1815-1880“...Helwing,...”
Published 1865
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131
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132Published 1912“...Helwing,...”
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133
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134
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135
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136by Rotermund, Heinrich Wilhelm, 1761-1848“...Helwing,...”
Published 1829
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137
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138
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139by Müller, Hermann Alexander, 1814-1894“...Helwing,...”
Published 1876
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140by Keck, Wilhelm, 1841-1900“...Helwing,...”
Published 1922
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