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1991
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1992
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1993
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1994
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1995
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1996
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1997
Sources of farm information of rice farmers in four Philippine barrios [microform]
Published 1977Visual Material -
1998
Effect of channel variation on message comprehension among extension workers [microform]
Published 1977Visual Material -
1999
A numerical study of bias estimation of variance in systematic sampling of Philippine households [microform]
Published 1977Visual Material -
2000