Published in Raptor Research, in 1976, in volume 10, issue 1, pages 1-8

Published in Raptor Research, in 1976, in volume 10, issue 1, pages 9-19

Published in Raptor Research, in 1976, in volume 10, issue 1, pages 21-28

Published in Raptor Research, in 1976, in volume 10, issue 1, pages 30-32

Published in Raptor Research, in 1976, in volume 10, issue 2, pages 33-44

Published in Raptor Research, in 1976, in volume 10, issue 2, pages 45-49

Published in Raptor Research, in 1976, in volume 10, issue 2, pages 55-57

Published in Raptor Research, in 1976, in volume 10, issue 2, pages 58-60

Published in Raptor Research, in 1976, in volume 10, issue 2, pages 61-64

Published in Raptor Research, in 1976, in volume 10, issue 3, pages 65-71

Published in Raptor Research, in 1976, in volume 10, issue 3, pages 73

Published in Raptor Research, in 1976, in volume 10, issue 3, pages 74-76

Published in Raptor Research, in 1976, in volume 10, issue 3, pages 77-83

Published in Raptor Research, in 1976, in volume 10, issue 3, pages 84-87

Published in Raptor Research, in 1976, in volume 10, issue 3, pages 88

Published in Raptor Research, in 1976, in volume 10, issue 3, pages 89

Published in Raptor Research, in 1976, in volume 10, issue 3, pages 90-91

Published in Raptor Research, in 1976, in volume 10, issue 3, pages 92-96

Published in Raptor Research, in 1976, in volume 10, issue 4, pages 97-107

Published in Raptor Research, in 1976, in volume 10, issue 4, pages 108-111

Published in Raptor Research, in 1976, in volume 10, issue 4, pages 112-119

Published in Raptor Research, in 1976, in volume 10, issue 4, pages 120-128