Description
Published:1985-
Item Description:Purchase from: Supt. of Docs., U.S. Govt. Print. Off., Washington, D.C. 20402.
Issues previously classed: I 29.2:N 21/26/
Description based on: 1985.
Shipping list number: 86-182-P.
1985.
Physical Description:volumes : illustrations ; 21 cm.
Publication Frequency:Biennial
ISSN:0272-9717.