Deskribapena
Argitaratua:No. 1 (Dec. 1973)-
Ceased with no. 9 (Apr. 1999).
Alearen deskribapena:Each no. also has a distinctive title.
Title from caption.
Deskribapen fisikoa:v. : ill. ; 28 cm.
Argitaratze maiztasuna:Irregular
ISSN:0093-4496
Antzeko dokumentuak:Issued also in French: Population reports (Washington, D.C.). Série H, Barrières mécaniques et chimiques.