Biographie de Norbert E. W. Schramm
The author Norbert E. W. Schramm has keeping and breeding a wide variety of bird species since his earliest youth. He also deals with the basics of genetics and plumage colouration, which made him well-known in professional circles. With his successful books he makes his experience available to all interested bird lovers.
In the 2nd volume of the "Compendium-Canaries", the genetic basics for a targeted standard breeding of the colour canaries are clearly treated.
Closely related to this is the fascinating hybrid breeding.