ID:DA07489055
Babson, Roger W.
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by Roger W. Babson
Babson Institute c1909-
[1909 ed.] , 4th ed , 5th ed , 6th ed , 7th ed , 9th ed , 10th ed , 11th ed , 13th ed , 14th ed , 15th ed
Available at 18 libraries
Wilson 1913
Available at 17 libraries
by Roger W. Babson and Ralph May
In-house reproduction
Available at 1 libraries
Babson's Statistical Organization c1912
