What has the author Henry C Eyer written?

Answer 1

Henry C. Eyer has written:

'Die Union Choral Harmonie' -- subject(s): Shape-note hymnals, Choruses, Sacred (Mixed voices) with organ, Psalms (Music)

'Die Union Choral Harmonie' -- subject(s): Shape-note hymnals, Choruses, Sacred (Mixed voices) with organ, Psalms (Music)

'Die Union Choral Harmonie' -- subject(s): Shape-note hymnals, Choruses, Sacred (Mixed voices) with organ, Psalms (Music)

Answer 2

John Charles Geyer has written:

'Textile waste treatment and recovery' -- subject(s): Textile factories, Water, Textile industry, Factory and trade waste, Pollution

'Ground water in the Baltimore industrial area' -- subject(s): Water, Water-supply, Groundwater, Pollution