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Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (735.767 KB) | DOI: 10.14238/pi33.1-2.1993.32-6
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Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (400.445 KB) | DOI: 10.14238/pi32.7-8.1992.184-9
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Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (832.067 KB) | DOI: 10.14238/pi28.1-2.1988.1-13
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Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (681.196 KB) | DOI: 10.14238/pi28.3-4.1988.49-59