Circular on the saving of energy in the utilization of buildings (appendix)
Edition 1980-03-06

Circular on hints for energy saving in building projects of the Land (appendix)
Edition 1979-12-20

Circular on the exemption from the obligation of accounting of consumption-dependent heating costs
Edition 1983-08-04

General road construction circular No. 6/1962: law and legislation
Edition 1962-08-18

Circular to the supreme Land authorities responsible for the implementation of the X-ray Ordinance (part A of the notification on the implementation of the X-ray Ordinance)
Edition 1974-01-07

General road construction circular No. 3/1985; legal system; equipment and traffic engineering
Edition 1985-01-11

General road construction circular, Nr.2/1982: the designing and planning of Federal highways; guidelines on the distances between roads and airports
Edition 1982-01-19

General road construction circular 11/67; protection against frost; frost damages on roads, traffic limitations during the thaw period, registration and description of the damages and of the frost-proof finishing
Edition 1967-07-29