TY - MANSCPT AU - Roberts,Walter Orr TI - Preliminary studies of the solar corona and prominences with the Harvard coronagraph PY - 1943/// KW - Harvard College Observatory KW - High Altitude Observatory, Climax, Colo KW - Coronagraphs KW - Colorado KW - Sun KW - Corona KW - Prominences N1 - Title from cover; Thesis (Ph. D.)--Harvard University, 1943; Includes bibliographical references; Thesis (Ph. D.)--Harvard University, 1943; Photocopy (microfilm blow-back); 28 cm; Photocopy (microfilm blow-back); Cambridge, Mass.; Harvard University Archives; [1999?]; 95, [32] leaves : ill., map ; 28 cm ER -