Druk Holding and Investments. DHI Annual report 2015 / - Thimphu, Bhutan : Druk Holding and Investments, 2015. - 140 p. : ill. (col. photographs) ; 26 cm. ISBN: NA LC Class. No.: GD00522-GD00523 Dewey Class. No.: A5.4 / DHI Gov. Doc. Class. No.: A5.4