Published in Occasional Papers Museum of Texas Tech University, in 1991, in volume 137, pages 1-15

Published in Occasional Papers Museum of Texas Tech University, in 1991, in volume 138, pages 1-11

Published in Occasional Papers Museum of Texas Tech University, in 1991, in volume 139, pages 1-17

Published in Occasional Papers Museum of Texas Tech University, in 1991, in volume 140, pages 1-19

Published in Occasional Papers Museum of Texas Tech University, in 1991, in volume 141, pages 1-14

Published in Occasional Papers Museum of Texas Tech University, in 1991, in volume 142, pages 1-32

Published in Occasional Papers Museum of Texas Tech University, in 1991, in volume 143, pages 1-4

Published in Occasional Papers Museum of Texas Tech University, in 1991, in volume 144, pages 1-20