SID Symposium Digest of Technical Papers Volume 54 Issue 1 Volume 53 Issue s1 Issue 1 Volume 52 Issue 1 Volume 51 Issue 1 Volume 50 Issue 1 Volume 49 Issue 1 Volume 48 Issue 1 Volume 47 Issue 1 Volume 46 Issue s1 Issue 1 Volume 45 Issue 1 Volume 31 Issue 1