Add to ORKG"Reprinted from The Popular science monthly, March, 1904".Mode of access: Internet
"Reprinted from Science, April 2, 1909, March 11, 1910, and March 3, 1911."Mode of access: Internet
Reprinted from the Popular Science monthly, August, 1911.Cover-title.Mode of access: Internet
Reprinted from the Pedagogical Seminary, December, 1905, p. 383-426.Cover-title.Mode of access: Inte...
Reprinted from the Popular science monthly, April, 1905.Mode of access: Internet
"Reprinted from the Educational review, New York, January, 1902."Mode of access: Internet
"Reprinted from the Popular science monthly for July and August, 1887."Mode of access: Internet
"Reprinted for private circulation from the School review, v. xx, no. 9, November 1912."Mode of acce...
"First edition, September, 1908. Reprinted, May, 1911."Mode of access: Internet
Reprinted from the Popular science monthly, December, 1904.Caption title.Mode of access: Internet
"Reprinted from the Popular Science Monthly, for July, 1892."Mode of access: Internet
"First edition, September, 1908. Reprinted, May, 1911 and Nov. 1913."Mode of access: Internet
Reprinted from the Educational review, New York, April, 1902.Mode of access: Internet
"Reprinted from the School Review, a journal of secondary education, February, 1906."Mode of access:...
Reprinted from The annals of the American Academy of Political and Social Science, Philadelphia, Sep...
The Journal of geography, 1913, vol. xii, no. 4, pp. 113-117.Caption title.Mode of access: Internet
"Reprinted from Science, April 2, 1909, March 11, 1910, and March 3, 1911."Mode of access: Internet
Reprinted from the Popular Science monthly, August, 1911.Cover-title.Mode of access: Internet
Reprinted from the Pedagogical Seminary, December, 1905, p. 383-426.Cover-title.Mode of access: Inte...
Reprinted from the Popular science monthly, April, 1905.Mode of access: Internet
"Reprinted from the Educational review, New York, January, 1902."Mode of access: Internet
"Reprinted from the Popular science monthly for July and August, 1887."Mode of access: Internet
"Reprinted for private circulation from the School review, v. xx, no. 9, November 1912."Mode of acce...
"First edition, September, 1908. Reprinted, May, 1911."Mode of access: Internet
Reprinted from the Popular science monthly, December, 1904.Caption title.Mode of access: Internet
"Reprinted from the Popular Science Monthly, for July, 1892."Mode of access: Internet
"First edition, September, 1908. Reprinted, May, 1911 and Nov. 1913."Mode of access: Internet
Reprinted from the Educational review, New York, April, 1902.Mode of access: Internet
"Reprinted from the School Review, a journal of secondary education, February, 1906."Mode of access:...
Reprinted from The annals of the American Academy of Political and Social Science, Philadelphia, Sep...
The Journal of geography, 1913, vol. xii, no. 4, pp. 113-117.Caption title.Mode of access: Internet
"Reprinted from Science, April 2, 1909, March 11, 1910, and March 3, 1911."Mode of access: Internet
Reprinted from the Popular Science monthly, August, 1911.Cover-title.Mode of access: Internet
Reprinted from the Pedagogical Seminary, December, 1905, p. 383-426.Cover-title.Mode of access: Inte...
