my favorite rose nurseries and websites:

De Bierkreek

Peter Beales Classic Roses

Historische Rosenschätze

Rozenrijk

HMF (Help me Find/Roses)

Fitzbek Rose garden

RosaPlant

Select Roses

Daniel Schmitz Rosen 

Roses Loubert

Rolf Sievers

Paul Zimmerman

Historic Roses Group

Rosarium Sangerhausen

ARS, American Rose Society

Nederlandse Rozenvereniging

Old garden roses and beyond: ‘Notes on the origin of the Moss-Rose by Major C.C. Hurst’

Jean-Piere Vibert, an appreciation by Brent C. Dickerson

Rosegathering

Hof aan de Reune