Invitation to Bid no. 2012-079

PR no. 12-5094

Invitation to Bid no. 2012-077

PR nos. 12-5011, 12-4767, 12-5364, 12-5362, 12-5361

Invitation to Bid no. 2012-076

PR nos. 12-2951, 12-4934 and 12-4887

Invitation to Bid no. 2012-075

PR nos. 12-4499 and 12-4500

Invitation to Bid no. 2012-074

PR nos. 12-4591, 12-4575, 12-4576, 12-5012, 12-4584, 12-4752 and 12-4754