Harper's Weekly

the Royal Astronomical Society of Canada, Vol. 8, p.221-2 Images of Harper's Weekly front page story. [2011-08-08]. （原始内容存档于2010-06-05）.  150-year-old

達大學當助理教授之後，把這台投球機介紹給該校使用。 Hinton, Charles, "A Mechanical Pitcher", Harper's Weekly, March 20, 1897, p. 301–302 Physics in Higher-Dimensional Manifolds

recorded an 1860 meteor. Register Star. 21 July 2010. 4 Images of Harper's Weekly front page story. New Scientist. 1 June 2010 [2017-08-16]. （原始内容存档于2010-06-05）

2015）.  For example, "Col. Robert E. Lee's Report Concerning the Attack at Harper's Ferry, October 19, 1859"; Horace Greeley, The American Conflict: A History

（原始内容存档于2006-12-09）.  HarperCollins to Acquire Thomas Nelson. Publishers Weekly. 2011-10-31. （原始内容存档于2012-07-17）.  Casey Francis. HarperCollins Finalizes Acquisition