1974 Talachulitna River escapement investigations, 1974 Shell Creek escapement investigations, and 1974 Northern District escapement surveys
1974 Shell Creek escapement investigations
1974 Northern District escapement surveys
Cook Inlet data report ;
Upper Cook Inlet data report ;
1974 Talachulitna River escapement investigations, 1974 Shell Creek escapement investigations, and 1974 Northern District escapement surveys