Research in Education
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Published: 1972
Total Pages: 814
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Published: 1986
Total Pages: 568
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DOWNLOAD EBOOKAuthor: United States. Superintendent of Documents
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Published: 1972
Total Pages: 1194
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DOWNLOAD EBOOKFebruary issue includes Appendix entitled Directory of United States Government periodicals and subscription publications; September issue includes List of depository libraries; June and December issues include semiannual index.
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Published: 1987
Total Pages: 303
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DOWNLOAD EBOOKAuthor: Russell S. Walters
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Published: 1985
Total Pages: 24
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DOWNLOAD EBOOKS2Black cherry is one of the most valuable eastern hardwoods, but guides for choosing suitable seed sources for planting stock are limited. After 14 years, survival of 8 of 24 sources planted is greater than 70 percent, and there are no significant differences in height. These sources offer the greatest potential for planting in northwestern Pennsylvania; they include four Pennsylvania sources and one each from Tennessee, West Virginia, Ohio, and Virginia. Although these planted trees survived and grew satisfactorily, they did not grow better than nearby natural seedlings. If natural seedlings are available, the need or desirability of planting is questionable.S3.
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Published: 1986
Total Pages: 576
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DOWNLOAD EBOOKAuthor:
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Published: 1987
Total Pages: 334
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DOWNLOAD EBOOKAuthor:
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Published: 1970
Total Pages: 424
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