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Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14238/pi24.3-4.1984.49-56
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Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (434.772 KB) | DOI: 10.14238/pi25.5-6.1985.93-9
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Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (313.791 KB) | DOI: 10.14238/pi25.5-6.1985.107-11
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Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (587.915 KB) | DOI: 10.14238/pi28.11-12.1988.238-49
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Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14238/pi20.7-8.1980.139-44
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Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14238/pi20.7-8.1980.169-76