Published in Raptor Research, in 1978, in volume 12, issue 1-2, pages 1-14

Published in Raptor Research, in 1978, in volume 12, issue 1-2, pages 15-20

Published in Raptor Research, in 1978, in volume 12, issue 1-2, pages 28-34

Published in Raptor Research, in 1978, in volume 12, issue 1-2, pages 35-39

Published in Raptor Research, in 1978, in volume 12, issue 1-2, pages 40-45

Published in Raptor Research, in 1978, in volume 12, issue 3/4, pages 122-125