Published in Journal of Raptor Research, in 1987, in volume 21, issue 1, pages 3-7

Published in Journal of Raptor Research, in 1987, in volume 21, issue 1, pages 8-13

Published in Journal of Raptor Research, in 1987, in volume 21, issue 1, pages 14-20

Published in Journal of Raptor Research, in 1987, in volume 21, issue 1, pages 21-26

Published in Journal of Raptor Research, in 1987, in volume 21, issue 1, pages 27-31

Published in Journal of Raptor Research, in 1987, in volume 21, issue 1, pages 32-33

Published in Journal of Raptor Research, in 1987, in volume 21, issue 1, pages 33-35

Published in Journal of Raptor Research, in 1987, in volume 21, issue 1, pages 35-38

Published in Journal of Raptor Research, in 1987, in volume 21, issue 1, pages 38-39

Published in Journal of Raptor Research, in 1987, in volume 21, issue 2, pages 49-56

Published in Journal of Raptor Research, in 1987, in volume 21, issue 2, pages 57-66

Published in Journal of Raptor Research, in 1987, in volume 21, issue 2, pages 67

Published in Journal of Raptor Research, in 1987, in volume 21, issue 2, pages 68-70

Published in Journal of Raptor Research, in 1987, in volume 21, issue 2, pages 70-72

Published in Journal of Raptor Research, in 1987, in volume 21, issue 2, pages 72-73

Published in Journal of Raptor Research, in 1987, in volume 21, issue 2, pages 74

Published in Journal of Raptor Research, in 1987, in volume 21, issue 2, pages 75-77

Published in Journal of Raptor Research, in 1987, in volume 21, issue 2, pages 79-80

Published in Journal of Raptor Research, in 1987, in volume 21, issue 2, pages 80-81

Published in Journal of Raptor Research, in 1987, in volume 21, issue 2, pages 81

Published in Journal of Raptor Research, in 1987, in volume 21, issue 3, pages 85-94

Published in Journal of Raptor Research, in 1987, in volume 21, issue 3, pages 95-97

Published in Journal of Raptor Research, in 1987, in volume 21, issue 3, pages 98-102

Published in Journal of Raptor Research, in 1987, in volume 21, issue 3, pages 103-110

Published in Journal of Raptor Research, in 1987, in volume 21, issue 3, pages 111-115

Published in Journal of Raptor Research, in 1987, in volume 21, issue 3, pages 116-118

Published in Journal of Raptor Research, in 1987, in volume 21, issue 3, pages 118-120

Published in Journal of Raptor Research, in 1987, in volume 21, issue 3, pages 120-121

Published in Journal of Raptor Research, in 1987, in volume 21, issue 3, pages 121-124

Published in Journal of Raptor Research, in 1987, in volume 21, issue 3, pages 124

Published in Journal of Raptor Research, in 1987, in volume 21, issue 4, pages 147-152

Published in Journal of Raptor Research, in 1987, in volume 21, issue 4, pages 153-157

Published in Journal of Raptor Research, in 1987, in volume 21, issue 4, pages 157-159

Published in Journal of Raptor Research, in 1987, in volume 21, issue 4, pages 160