A Source Book of Problems for Geometry: Based Upon Industrial Design and Architectural Ornament [1912 ] by Mabel Sykes English | September 22, 2009 | ISBN: 1112489878 | 398 pages | DJVU | 6 MB
Originally published in 1912. This volume from the Cornell University Library's print collections was scanned on an APT BookScan and converted to JPG 2000 format by Kirtas Technologies. All titles scanned cover to cover and pages may include marks notations and other marginalia present in the original volume.
Double Stars for Small Telescopes: More Than 2,100 Stellar Gems for Backyard Observers (Stargazing Series) by Sissy Haas Sky Publishing | May 1, 2007 | English | ISBN: 1931559325 | 184 pages | PDF | 17 MB