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"Pennsylvania agricultural literature on microfilm." » "Pennsylvania agricultural literature on microform." (Expand Search)
"Pennsylvania agricultural literature on microfilm." » "Pennsylvania agricultural literature on microform." (Expand Search)
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1Philadelphia : [s.n.,v. : ill. ; 24 cm.“...Pennsylvania agricultural literature on microfilm....”
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2Philadelphia : [s.n.,v. : ill. ; 24 cm.“...Pennsylvania agricultural literature on microfilm....”