Yazar
Don Helms
3 cilt bulundu.
Cilt sonuçları
Shovelnose sturgeon in the Mississippi River, Iowa
Don R. Helms · State Conservation Commission, Fisheries Section
68 sayfa · 1974
Sturgeon fisheries / Freshwater fishes / Shovelnose sturgeon
Variations in the abundance of channel catfish year classes in the upper Mississippi River and causative factors
Don R. Helms · State Conservation Commission, Fisheries Section
31 sayfa · 1975
Fishes / Fish populations / Channel catfish / Reproduction