Improved commercial vehicle conspicuity and signalling systems. Task I: accident analysis and functional requirements. Interim report.

National Highway Traffic Safety Administration, Washington, D.C.

Improved commercial vehicle conspicuity and signalling systems. Task II: analyses, experiments and design recommendations. Interim report.

National Highway Traffic Safety Administration, Washington, D.C.

Motor vehicle rear lighting and signalling. Final report.

National Highway Safety Bureau, Washington, D.C.

Jak hodowaʹc kury na wsi.

Mode of access: Internet.

Joh. Jak. Redinger und seine Beziehungen au Johann Amos Comenius; eine historisch-pädigogische Skizze aus dem XVII. Jahrhundert.

Author autographed presentation copy.

Snúška starých #, jak se nasývaly v Čechách řsky, potoky, hory a lesy.

Bibliographical footnotes.

Jak my pracujemy : szkice z zycia naszego przemyslu.

Mode of access: Internet.

Notes of lectures on railroad signalling, at Massachusetts institute of technology;

Mode of access: Internet.