H. Willoughby

A Feeding Guide for Brook, Brown, and Rainbow Trout

Galen L. Buterbaugh, H. Willoughby, 1967 .

A Meal‐Gelatin Diet for Aquarium Fishes

H. Willoughby, Edward J. Peterson, R. Robinson, 1967 .

Use of Pellets as Trout Food

H. Willoughby, 1953 .

A Method for Calculating Carrying Capacities of Hatchery Troughs and Ponds

H. Willoughby, 1968 .