Zona na zdraveto
By: Borislav Evlogiev, Ivan Simeonov.
Publisher: Okrŭzhen sŭvet na Bŭlgarskite profesionalni sŭi͡u︡zi, Direkt͡s︡ii͡a︡ "Narodno zdrave i sot͡s︡ialni grizhi" pri ONS--Sofii͡a︡
Published: 1978
Place of publication: Pazardzhik
Language: bul
Number of pages: 44