Published in Journal of Raptor Research, in 1990, in volume 23, issue 3, pages 121-122

Published in Journal of Raptor Research, in 1990, in volume 24, issue 3, pages 41-46

Published in Journal of Raptor Research, in 1990, in volume 24, issue 3, pages 47-51

Published in Journal of Raptor Research, in 1990, in volume 24, issue 3, pages 52-55

Published in Journal of Raptor Research, in 1990, in volume 24, issue 3, pages 56-58

Published in Journal of Raptor Research, in 1990, in volume 24, issue 3, pages 59-63

Published in Journal of Raptor Research, in 1990, in volume 24, issue 3, pages 64-67

Published in Journal of Raptor Research, in 1990, in volume 24, issue 3, pages 68-69

Published in Journal of Raptor Research, in 1990, in volume 24, issue 3, pages 71-72

Published in Journal of Raptor Research, in 1990, in volume 24, issue 3, pages 72-74

Published in Journal of Raptor Research, in 1990, in volume 24, issue 4, pages 77-79

Published in Journal of Raptor Research, in 1990, in volume 24, issue 4, pages 80-83

Published in Journal of Raptor Research, in 1990, in volume 24, issue 4, pages 84-90

Published in Journal of Raptor Research, in 1990, in volume 24, issue 4, pages 91-97

Published in Journal of Raptor Research, in 1990, in volume 24, issue 4, pages 98-106

Published in Journal of Raptor Research, in 1990, in volume 24, issue 4, pages 107-112

Published in Journal of Raptor Research, in 1990, in volume 24, issue 4, pages 113-119

Published in Journal of Raptor Research, in 1990, in volume 24, issue 4, pages 120-123

Published in Journal of Raptor Research, in 1990, in volume 24, issue 4, pages 124-125

Published in Journal of Raptor Research, in 1990, in volume 24, issue 1-2, pages 5-11

Published in Journal of Raptor Research, in 1990, in volume 24, issue 1-2, pages 12-18

Published in Journal of Raptor Research, in 1990, in volume 24, issue 1-2, pages 19-25

Published in Journal of Raptor Research, in 1990, in volume 24, issue 1-2, pages 26-27

Published in Journal of Raptor Research, in 1990, in volume 24, issue 1-2, pages 27-28

Published in Journal of Raptor Research, in 1990, in volume 24, issue 1-2, pages 28-29

Published in Journal of Raptor Research, in 1990, in volume 24, issue 1-2, pages 34