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Factors that Influence Christmas Tree Sales
Northeastern Forest Experiment Station (Radnor, Pa.)
Thomas H. Pendleton
Lawrence D. Garrett
出版
Northeastern Forest Experiment Station, Forest Service, U.S. Department of Agriculture
, 1970
URL
http://books.google.com.hk/books?id=lQmlMQEACAAJ&hl=&source=gbs_api