Bhutan Standard Bureau. Bhutan standard internal house wiring standard / - Thimphu, Bhutan : Bhutan Standard Bureau, December 2019. - ix, 84 p. : ill. ; 30 cm. ISBN: NA LC Class. No.: GD00671-GD00672 Dewey Class. No.: A5.10 / BSB Gov. Doc. Class. No.: A5.10