diff --git a/BOOKSHELF b/BOOKSHELF
index b15a69b..94f8279 100644
--- a/BOOKSHELF
+++ b/BOOKSHELF
@@ -9,13 +9,13 @@
 N: XC6SLX45FGG484
 A: U1
 A: fpga
-D: http://www.xilinx.com/support/documentation/spartan-6.htm
+D: http://www.xilinx.com/support/documentation/data_sheets/ds160.pdf
 
 N: MT46V32M16TG
 A: U2
 A: U3
 A: ddr
-D: http://www.micron.com/products/ProductDetails.html?product=products/dram/ddr_sdram/MT46V32M16BN-5B
+D: http://download.micron.com/pdf/datasheets/dram/ddr/512MBDDRx4x8x16.pdf
 
 N: KSZ8001
 A: U4
@@ -25,7 +25,7 @@ D: http://www.micrel.com:8000/query?redirect&target=http%3A%2F%2Fwww.micrel.com%
 N: K9GAG08U0M-PCB0
 A: U5
 A: nand-flash
-D: http://www.samsung.com/global/business/semiconductor/productInfo.do?fmly_id=672&partnum=K9GAG08U0M
+D: http://downloads.qi-hardware.com/hardware/datasheets/K9GAG08U0M.pdf
 
 N: MIC2550
 A: U6
@@ -41,7 +41,7 @@ D: http://www.numonyx.com/Documents/Datasheets/M25P32.pdf
 N: ATtiny24A
 A: U9
 A: AVR
-D: http://www.atmel.com/dyn/products/product_card.asp?PN=ATtiny24A
+D: http://www.atmel.com/dyn/resources/prod_documents/doc8183.pdf
 
 N: A7131
 A: U10
@@ -56,11 +56,11 @@ A: U13
 A: U14
 A: U16
 A: U17
-D: http://www.fairchildsemi.com/pf/FA/FAN4010.html
+D: http://www.fairchildsemi.com/ds/FA/FAN4010.pdf
 
 N: A7117
 A: U15
-D: http://www.ait-ic.com/uploads//2009-11/05/_1257416506_l5u835.pdf
+D: http://www.ait-ic.com/uploads/2009-11/05/_1257416506_l5u835.pdf
 
 N: TPS793XX
 A: U18
@@ -71,5 +71,5 @@ D: http://focus.ti.com/lit/ds/symlink/tps79325-q1.pdf
 N: ft2232h
 D: http://www.ftdichip.com/Support/Documents/DataSheets/ICs/DS_FT2232H.pdf
 
-N: ft2232c
-D: http://www.ftdichip.com/Support/Documents/DataSheets/ICs/DS_FT2232C.pdf
+N: ft2232d
+D: http://www.ftdichip.com/Support/Documents/DataSheets/ICs/DS_FT2232D.pdf