Published in Raptor Research, in 1982, in volume 16, issue 1, pages 1-4

Published in Raptor Research, in 1982, in volume 16, issue 1, pages 4-10

Published in Raptor Research, in 1982, in volume 16, issue 1, pages 10-13

Published in Raptor Research, in 1982, in volume 16, issue 1, pages 14-17

Published in Raptor Research, in 1982, in volume 16, issue 1, pages 18-24

Published in Raptor Research, in 1982, in volume 16, issue 1, pages 25-26

Published in Raptor Research, in 1982, in volume 16, issue 1, pages 26-27

Published in Raptor Research, in 1982, in volume 16, issue 1, pages 27-28

Published in Raptor Research, in 1982, in volume 16, issue 2, pages 33-36

Published in Raptor Research, in 1982, in volume 16, issue 2, pages 36-39

Published in Raptor Research, in 1982, in volume 16, issue 2, pages 39-53

Published in Raptor Research, in 1982, in volume 16, issue 2, pages 54-58

Published in Raptor Research, in 1982, in volume 16, issue 2, pages 58-59

Published in Raptor Research, in 1982, in volume 16, issue 2, pages 59-60

Published in Raptor Research, in 1982, in volume 16, issue 2, pages 60-61

Published in Raptor Research, in 1982, in volume 16, issue 2, pages 61-62

Published in Raptor Research, in 1982, in volume 16, issue 2, pages 63

Published in Raptor Research, in 1982, in volume 16, issue 3, pages 65-70

Published in Raptor Research, in 1982, in volume 16, issue 3, pages 71-76

Published in Raptor Research, in 1982, in volume 16, issue 3, pages 77-79

Published in Raptor Research, in 1982, in volume 16, issue 3, pages 79-82

Published in Raptor Research, in 1982, in volume 16, issue 3, pages 83-88

Published in Raptor Research, in 1982, in volume 16, issue 3, pages 89-90

Published in Raptor Research, in 1982, in volume 16, issue 3, pages 91-92

Published in Raptor Research, in 1982, in volume 16, issue 3, pages 95-96

Published in Raptor Research, in 1982, in volume 16, issue 4, pages 97-103

Published in Raptor Research, in 1982, in volume 16, issue 4, pages 103-109

Published in Raptor Research, in 1982, in volume 16, issue 4, pages 123-128

Published in Raptor Research, in 1982, in volume 16, issue 4, pages 128-132

Published in Raptor Research, in 1982, in volume 16, issue 4, pages 132-134

Published in Raptor Research, in 1982, in volume 16, issue 4, pages 134-136

Published in Raptor Research, in 1982, in volume 16, issue 4, pages 136