This might be of interest:
https://www.slideshare.net/gosiaa_g/timeline-history-of-golub-dobrzy
 
One of my great grandfather�s� family was from Golub-Dobrzyn and I  haven�t been able to find much.  I barely knew my ggf as he died when I was six years old.  
Aside from manifests, All the records I have for my Raphael/Rehfeld/Rayfield branch are from the US.  

Barbara Rice
Researching Rehfeld in Golub-Dobrzyn
 

--
Barbara Rice,  Minneapolis MN
Researching KUPFERSCHMIDT - Radekhiv Ukraine (Radziechow, Galicia) and Philadelphia PA; ZUCHOVITZ - Stowtsby Belarus and Woodbine NJ; ROHSSLER - Krakow and New York City; REHFELD- Gollub-Dobrzyn; RUSONIK - Polotsk Belarus, Manchester England, New York City and Providence RI.