141
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142
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143
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Ηλεκτρονική πηγή Επιστημονικό περιοδικό
144
Έκδοση 1981
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145
Full text available from ABI/INFORM Global: 03/01/2004 to present
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146
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148
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150
Έκδοση 1976
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151
Έκδοση 1997
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152
Έκδοση 1985
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153
Έκδοση 1962
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154
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155
Έκδοση 2008
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156
Έκδοση 1996
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157
Έκδοση 1992
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160
Έκδοση 2007
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