sheet music

I have some sheet music that my mother is trying to find out the worth of.  Any help would be appreciated.  Either where I can find info. or pricing. Thank you.

---Standard Graded Course of Studies for the Piano Forte in Ten Grades consisting of standard Etudes and Studies arranged in progressive order.  Selected from the best composers for the cultivation of technique, taste, and sight reading.  Compiled by W.S.B Mathews.  Copyright 1892 by Theodor Presser, Philidelphia.  32 pages.

---Presser's Musical Magazine The Etude, Vol. XL, No. 70, October 1922

---The Etude Music Magazine, July 1924

---The Sweetheart of Sigma Chi, 28th edition, 1927, Melrose Brothers Music Company Inc., Chicago. 8 pages

---Selections from Ginn & Company's Music Publications to accompany The Teacher's Portfolio.

---The Young Ladies Home Journal, February 1879

---Songs by Alfred Hiles Bergen

---Schirmer's Library of Musical Classics, Vol.648, Pierre Rode, Concerto No. 8 in Emonor for violin (violin and piano).  Edited and fingered by Leopold Lichtenberg.  The Piano accompaniment arranged by Friedrich Hermann. Copyright 1901 Schirmer. 22 pages, complete.

----- This is just the tip of the iceberg in what my mother has gotten.  I just need an idea of what she has. feel free to e-mail me.