ita ... is short for  Introduction to Analysis  by Maxwell Rosenlicht, Dover (Mineola, New York, USA), 1986:

"[The] Dover edition, first published in 1986, is an unabridged and unaltered republication of the work first published by Scott Foresman and Company, Glenview, Illinois, in 1968."

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Quotations are with permission.  Citations are generally in the following form:  ita-i-j-k-pgn, where  i  is the chapter number,  j  is the section number,  k  is the paragraph number, and  pgn  gives the page.  Note that the paragraph number is counted from the beginning of the section to facilitate reference to the Scott Foresman edition.

Converted by Mathematica      November 14, 2007