Je was op zoek naar: wos codes and where to input them (Spaans - Engels)

how and where to donate.
how and where to donate.

and where to put the emphasis.
and where to put the emphasis.

== obras ==* the observing guide to the messier marathon: a handbook and atlas* decade of comets: a study of the 33 comets discovered by amateur astronomers between 1975 and 1984* an observer's guide to comet hale-bopp: making the most of comet hale-bopp : when and where to observe comet hale-bopp and what to look for== referencias ==* "sky and telescope": comet machholz in the evening sky
== books by don machholz ==* the observing guide to the messier marathon: a handbook and atlas* decade of comets: a study of the 33 comets discovered by amateur astronomers between 1975 and 1984* an observer's guide to comet hale-bopp: making the most of comet hale-bopp : when and where to observe comet hale-bopp and what to look for== references ==