Tests of strength of roof supports used in anthracite mines of Pennsylvania /

"Report of the United States Bureau of Mines to the Pennsylvania State Anthracite Mine Cave Commission and review of the compressive strength of anthracite, bituminous coals and mine supports."

Wrongs and their remedies: being a treatise on the law of torts.

Mode of access: Internet.

Letter of the Postmaster General to Hon. George W. Hopkins, in answer to a publication made by the Joint Board of Directors of the Delaware and Raritan Canal and Camden and Amboy Railroad and Transportation Companies.

Signed: C. Johnson, Postmaster General.

The history of the parish church of All Saints', Maidstone with illustrations.

Mode of access: Internet.

Valeriemaya seagriefii; Delesseriaceae

Valeriemaya seagriefii O.De Clerck, M.J.Wynne, & H.Stegenga

Discours politiques /

Mode of access: Internet.