"shields, john p. "
how to build proximity detectors and metal locators: / john.p. shields - 1 ed. - uk : foulsham-sam 1966. - ", 128p.; 22 cm."
hard cover
621. 384 12 shi
how to build proximity detectors and metal locators: / john.p. shields - 1 ed. - uk : foulsham-sam 1966. - ", 128p.; 22 cm."
hard cover
621. 384 12 shi