Earth sheltered homes : plans and designs; underground space center; University of Minnesota / D. Ahrens; Tom Ellison; Ray Sterling. — New York : Van Nostrand Reinhold, 1981. — 125 p. : plan., grab. ; 21 [apais] cm. — 1. Arquitectura subterránea. 2. Vivienda. I. Ellison, Tom, col.. II. Sterling, Ray, col.. 728