Security Guard's Manual. /
De Leon, Sixto O.
Security Guard's Manual. / Sixto D. De Leon. - Quezon City : JMC Press, c1979. - xii, 193 p.:ill. 22 cm.
Security guards
Security Guard's Manual. / Sixto D. De Leon. - Quezon City : JMC Press, c1979. - xii, 193 p.:ill. 22 cm.
Security guards