Peter Skalfist, is the pen name of a history and science author that aims to organize and collect technical, historical and scientific information.
The student or the scientist, will be able to satisfy his needs of consultation and of study, by means of a work supported by abundant number of sources and bibliographical references.

Daniel Mikelsten, is the pen name of a history and science author that aims to organize and collect technical, historical and scientific information.
The student or the scientist, will be able to satisfy his needs of consultation and of study, by means of a work supported by abundant number of sources and bibliographical references.

Vasil Teigens, is the pen name of a history and science author that aims to organize and collect technical, historical and scientific information.
The student or the scientist, will be able to satisfy his needs of consultation and of study, by means of a work supported by abundant number of sources and bibliographical references.