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- Skurzynski, Gloria, National parks mystery, 9
- Over the edge, by Gloria Skurzynski and Alane Ferguson
- Skurzynski, Gloria, National parks mystery, #6
- Escape from fear, by Gloria Skurzynski and Alane Ferguson
- Skurzynski, Gloria, National parks mystery, 8
- Skurzynski, Gloria, Mysteries in our national parks, #3
- Skurzynski, Gloria, Mysteries in our national parks, #8
- Skurzynski, Gloria, Mysteries in our national parks, #5
- Skurzynski, Gloria, Mysteries in our national parks, #7
- Skurzynski, Gloria, Mysteries in our national parks, #1
- Skurzynski, Gloria, Mysteries in our national parks, #6
- Wolf stalker, Gloria Skurzynski and Alane Ferguson
- Valley of death, by Gloria Skurzynski and Alane Ferguson
- Deadly waters, Gloria Skurzynski and Alane Ferguson
- Skurzynski, Gloria, Mysteries in our national parks, #9
- Skurzynski, Gloria, National parks mystery, #1
- The hunted, by Gloria Skurzynski and Alane Ferguson
- Ghost horses, Gloria Skurzynski and Alane Ferguson
- Here comes the mail, by Gloria Skurzynski
- Skurzynski, Gloria, National parks mystery, 7
- Skurzynski, Gloria, National parks mystery, #3
- Skurzynski, Gloria, National parks mystery, #5
- Skurzynski, Gloria, Mysteries in our national parks