1956 



Aass, P. 1956. Sil-andens naering i ferskvann. Norg. Jeger-og Fisk Forb. 

 85: 8-14. 



Bergman, G. 1956. Om kullsaramanslagning hos skrater , Mergus serrator , och 

 Mergus merganser . Fauna Flora 1956: 97-110. [In Swedish with English 

 summary. ] 



Pflugbeil, A. 1956. Bruten des Mlttelsagers auf Schleimunde, 1955. Vogelwelt 

 77: 44-47. 



1954 



Curth, P. 1954. Der Mittelsager. A. Ziemsen Verlag. Wittenburg Lutherstadt. 

 102 pp. [In German.] 



1953 



Penner, L. R. 1953. The Red-breasted Merganser as a natural avian host of 



the causative agent of Clam Digger's Itch. J. Parasitol. 39 (suppl.): 20. 



1952 



Erickson, J. G. 1952. A possible hybrid between the Hooded Merganser and the 

 Red-breasted Merganser. Wilson Bull. 64: 167. 



Owen, D. F. 1952. Red-breasted Merganser breeding in Cumberland. Brit. 

 Birds 45: 294. 



1951 



Hoogerheide, C. and C. Groot. 1951. Enkele notities over het gedrage van de 

 Middleste Zaagbek. Lev. Naturr 54: 33-38. 



Ringleben, H. 1951. Aus dem Leben des Mittelsagers ( Mergus serrator L.). I. 

 Vogelwelt 72: 43-50, 84-87, 119-128. [In German.] 



1950 



Yocum, C. F. 1950. Red-breasted Merganser in eastern Washington. Murrelet 

 31: 13. 



1947 



Adams, R. G. 1947. Mating behaviour of Wigeon and Red-breasted Merganser. 

 Brit. Birds 40: 186-187. 



1946 



Bunker, A. 1946. Gulls taking fish from mergansers. Can. Field-Nat. 60: 115. 



436 



